写出下列动词的过去式形式。
（1）give （2）go
（3）see （4）drop
（5）walk （6）think
（7）lose （8）open
（9）want （10）have
根据上下文，补全对话。(12分)
A: Look our classroom.
B: Oh, it is very dirty.
A: Let’s keep our classroom .
B: All right. I can the rubbish the bin.
C: I can the floor with Lily.
D: I can the desks and chairs.
A: Good idea. Let’s start.
B&C&D: OK!
听录音，补全短文。(10分)
Our city ______ messy and ______ because of the ______ and rubbish. To keep the city ______, we should do our best. We can take the bus or ______ to school every day. We can put rubbish in the ______. We can ______ ______ trees. They ______ keep the ______ clean.
根据汉语意思完成句子。
（1）昨天，杨玲和妈妈去了一个购物中心。
Yang Ling and her mother were at a centre yesterday.
（2）请不要把你的狗带入书店。
Please don’t your dog the bookshop.
（3）有人在抽烟吗？我能闻到烟味。
Is smoking here? I can it.
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