Question

小题1:We ________(听到) him singing in the next room when we passed.
小题2:The tired children don’t get home _________（直到）7 pm.
小题3:While the boy was          (争吵) with his sister, their mother came into the room.
小题4:The dog has three legs. How ________(奇怪的) it is!
小题5:Many athletes give money to schools and charities, and do a lot of work to help people.
This is a great ______(机会) that many people do not have.

Answer 1

小题1:heard
小题2:until
小题3:arguing
小题4:strange
小题5:chance

小题1:本句的从句为一般过去时，故主语也应该用过去式，故本题空格处填听见的过去式heard。
小题2:本题的含义为疲惫的孩子们直到晚上7点钟才到家，not……until表示直到……才的含义，故本句空格处填until。
小题3:while后引导的从句为过去进行时，结构为was+现在分词，故本句空格处填争吵的现在分词arguing。
小题4:be动词后跟形容词，在感叹句中，how后跟形容词，故本句空格处填奇怪的形容词strange。
小题5:本句的含义为这是许多人没有的极好的机会，冠词a后跟名词，故本题空格处填机会的名词形式chance。