【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.

1.We ________(听到) him singing in the next room when we passed.

2.The tired children don’t get home _________（直到）7 pm.

3.While the boy was          (争吵) with his sister, their mother came into the room.

4.The dog has three legs. How ________(奇怪的) it is!

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.

根据下列句子的意思及所给汉语注解，写出空缺处各单词的正确形式，每空只写一词。

68. We ________(听到) him singing in the next room when we passed.

69. The tired children don’t get home _________（直到）7 pm.

70. While the boy was           (争吵) with his sister, their mother came into the room.

71. The dog has three legs. How ________(奇怪的) it is!

72. 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.