There was a ．knock at the door．It was the second time someone _____

单选题 There was a ．knock at the door．It was the second time someone ________me that evening．

A．had interruped
B．would have interrupted
C．to have interrupted
D．to interrupt

参考答案A

解析: A。有敲门声。这是那晚第二次有人打断我了。
考查动词时态。句子出现了the secondtime，可知要用完成时；句子讲述过去发生的事隋，所以用过去完成时。

单选题 Our modem civilization must not be thought of as ________in a short period of time．

A．being created
B．to have been created
C．having been created
D．to be created

单选题 When Jane fell offthe bike, the other children______

A．were not able to help laughter
B．could not help but laughing
C．could not help laughing
D．could not help to laugh

单选题 It's the first time that she has been to the United States,_____?

A．isn't she
B．hasn't she
C．isn't it
D．hasn't it