第三节 语法和词汇知识（共30小题；每小题1分，满分30分）
11.My hometown has changed so much that I can't ________ it.
A．know B．understand C．recognize D．realize
12.There was a lot of fun at yesterday's party.You ________ come，and what a pity!
A．might have B．should have C．could have D．would have
13.Good use that the villagers have been ________ the water resources has brought them a large income.
A．making of B．putting into C．taking on D．providing with
14.The child asked his mother go out to play teenis.
A. that he could B. if he could C. whether could he D.that if he could
15.Someone called me up in the middle of the night, but they hung up ________I could answer the phone.
A．since B．until C．before D．as
