1.The girl was often heard ( ) happily in her room.（09 泰安）

题目

1.The girl was often heard ( ) happily in her room.（09 泰安）
A.sing B.to sing C.singing D.sings 选C,为什么不选B?
2.Your car needs （ ）.
A.repaired B.repairing C.to repair D.being repaired
这题选B,为什么不选C
3.The People's Republic of China （ ）on Oct.1,1949.
A.found B.was found C.is founded D.was founded
选D,难道found与find的过去式found不一样吗?为什么不是C

答案

1.hear sb doing sth、不用不定式、这里为被动语态、不是过去进行时、而是现在分词doing作宾语补足语.2.need doing=need to be done、选C要变成to be repaired.3.found的过去式是founded、建立成立的意思.find的过去...