此题是考查非谓语动词吗

有这样一道题：

__________ many times，but the boys still couldn’t understand it.

A. Having told              B. Though he had been told    C. He was told              D. Having been told

现分析如下：

此题应选C。容易误选A，D，考生从四个选项中初看一眼便断定此题是考查非谓语动词，这刚好落入了命题者的设置的陷阱。做好此题的关键点在于注意到句中的并列连词but，因为它的存在就表明这是一个并列句，所以前面应是一个完整的句子而不能是一个非谓语动词。

1. ________ask the teacher if you have any questions.

A. Doing                      B. Do                         C. To do                       D. Done

2. ________ hard and you’ll pass the college entrance examinations.

A. Study                      B. Studying                 C. To study                   D. Studied

3. _________ down the radio —— the baby’s asleep in the next room.

A. Turning                   B. Turn                       C. Turned                     D. To turn

4. On Saturday afternoon，Mrs Green went to the market，________ some fruit and visited her cousin.

A. bought                     B. buying                    C. to buy                      D. buy

5. She set out soon after dark _________ home an hour later.

A. arriving                    B. to arrive                  C. having arrived           D. and arrived

答案：1. B 2. A 3. B 4. A 5. D