1 We mustn't eat or drink in class. 我们不能在课堂上吃东西和喝东西.
2 They will plant trees on the hill this Sunday. 这个星期天他们将在山上种树.
3 The twins are playing games in the garden. 这两个双胞胎下下在花园里玩.
4 My sister joined the Youth League last year. 我姐姐去年加入共青团.
5 The teacher asked me a question but I couldn't answer this morning .
今天早上老师问我一个问题,但我不能回答.