有时不用连词连接句子，而用破折号，情况也是一样(答案均选A)。如：

(6) _____ down the radio — the baby’s asleep in the next room.

A. Turn                                                    B. Turning

C. to turn                                                 D. To have turned

(7) _____ some of this juice — perhaps you will like it.

A. Try                                                      B. Trying

C. To try                                                  D. To have tried

以下各题也应选A，是因为句中的从属连词 when, before, until 等（填空句为祈使句）：

(8) ______ him enough time to get home before you telephone.

A. Give                                                    B. To give

C. Giving                                                 D. Given

(9) ______ left when you get to the end of the street.

A. Keep                                                   B. Keeping

C. To keep                                                D. Kept

(10) ______ your hand over your mouth when you cough.

A. Put                                                      B. Putting

C. To put                                                  D. To be putting

(11)______ until the lights have turned to green.

A. Wait                                                    B. To wait

C. Waiting                                                D. Having waited

(12) ______ the pieces of cloth with a loose stitch before finally sewing them together.

A. Join                                                     B. To join

C. Joining                                                D. Joined

以下各题也应选A，因为填空句为祈使句：(www.yygrammar.com)

(13) I don’t want to listen a long story — just _____ me the result.

A. tell                                                      B. telling

C. to tell                                                   D. to be telling

(14) Why stand there watching — _____ and help us!

A. come                                                   B. coming

C. to come                                                D. to be coming

(15) Don’t waste your money on silly things — ______ it.

A. save                                                     B. to save

C. saving                                                  D. having saved

(16) First ______ the rice by washing it, then ______ it in boiling water.

A. prepare, cook                                       B. preparing, cooking

C. preparing, cook                                     D. prepare, cooking

(17) To test eggs, _____ them in a bowl of water: if they float they’re bad, if they sink they’re good.

A. put                                                      B. putting

C. to put                                                   D. to be putting

但是请注意，类似下面这样的题目情形有所不同，所填部分为目的状语（用不定式，即答案选B）：

(18) ______ French well, she went to France to live with his cousins.

A. Study                                                  B. To study

C. Studying                                              D. Having studied

(19) _____ late in the morning, Mr. Smith turned off the alarm.

A. Sleep                                                   B. To sleep

C. Sleeping                                               D. Having slept

(20) ______ the flies out, we had to shut all the doors and windows.

A. Keep                                                   B. To keep

C. Keeping                                               D. Having kept

(21) ______ their service, the workers of the hotel are active in learning English.

A. Improving                                            B. To improve

C. Improve                                               D. Having improved

◆最新原创陷阱题（附详解）◆

1. He looked around and caught a man ______ his hand into the pocket of a passenger.

A. put                                                      B. to be putting

C. to put                                                   D. putting

2. When you’re learning to drive, _______ a good teacher makes a big difference.

A. have                                                    B. having

C. and have                                              D. and having

3. I felt it a great honour ______ to speak to you.

A. to ask                                                  B. asking

C. to be asked                                           D. having asked

4. I would love _______ to the party last night but I had to work extra hours to finish a report.

A. to go                                                   B. to have gone

C. going                                                   D. having gone

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