一 sale 和 sell 词义与词性辨析，用 sale/sell 填空。
1. We will old books to get money.
2. There is a big in the shop today.
3. They want to their old toys.
4. I will buy a robot model on .

1. sell 2. sale 3. sell 4. sale

二 一般现在时的动词形式变化，用所给单词的适当形式填空。
1. She often (save) money every week.
2. I usually (buy) books with my pocket money.
3. He (wait) for a sale to buy things cheaply.
4. They (manage) their money well at school.

1. saves 2. buy 3. waits 4. manage

三 介词for/with辨析，用for/with填空。
1. I'm going to buy a gift my grandpa.
2. I will pay services.
3. Mike is careful his money.
4. They save up a new bike.
5. We can get money selling old things.

1. for 2. for 3. with 4. for 5. for

四 be going to结构中be动词的正确使用 Chen Jie将要去参加人工智能竞赛，她向大家介绍她的活动计划。读一读，用合适的be动词填空补全她的介绍。
The AI Competition is coming. I 1. going to take part in it. My friend Tom 2. going to join me too. We 3. going to make a smart robot. It 4. going to help us protect the environment. Our teachers 5. going to help us. I'm sure we 6. going to have a wonderful time.

1. am 2. is 3. are 4. is 5. are 6. are