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Written exercises 书面练习
A Rewrite these sentences, using either has to or I think he is probably ...模仿例句，使用has to或I think he is probably ... 改写以下句子。
Examples：
He must be home before six o'clock.
He has to be home before six o'clock.
He must be tired.
I think he is probably tired.
1 He must be here at six o'clock.
2 He must be busy.
3 He must be at the office early tomorrow.
4 He must be sleeping.
5 He must be French.
6 He must be in France next week.
7 He must be an engineer.
B Write new sentences.
模仿例句改写下列句子。
Example：
I think she's Danish. (Swedish)
I don't think so. She can't be Danish.
She must be Swedish.
1 I think she's Italian. (Greek)
2 I think he's English. (American)
3 I think they're Canadian. (Australian)
4 I think he's a mechanic. (engineer)
5 I think he's a bus conductor. (bus driver)
6 I think he's a sales rep. (the boss)
7 I think he's twenty-four. (thirty)
8 I think they're five. (seven)
9 I think he's seventy-six. (over eighty)
10 I think she's fifty-five. (under fifty)
11 I think it's the 21st today. (20th)
12 I think it's Tuesday today. (Wednesday)
13 I think it's the 2nd today. (3rd)
14 I think it's cheap. (expensive)
15 I think it's easy. (difficult)
16 I think she's old. (young)
17 I think they're early. (late)
18 I think he's reading. (sleeping)
19 I think they're listening to the radio. (watching television)
20 I think she's retiring. (looking for a new job)
答案：
Lesson128
A
1 He has to be here at six o'clock.
2 I think he is probably busy.
3 He has to be at the office early tomorrow.
4 I think he is probably sleeping.
5 I think he is probably French.
6 He has to be in France next week.
7 I think he is probably an engineer.
B
1 I don't think so. She can't be Italian. She must be Greek.
2 I don't think so. He can't be English. He must be American.
3 I don't think so. They can't be Canadian. They must be Australian.
4 I don't think so. He can't be a mechanic. He must be an engineer.
5 I don't think so, He can't be a bus conductor. He must be a bus driver.
6 I don't think so. He can't be a sales rep. He must be the boss.
7 I don't think so. He can't be twenty-four. He must be thirty.
8 I don't think so. They can't be five. They must be seven.
9 I don't think so. He can't be seventy-six. He must be over eighty.
10 I don't think so. She can't be fifty-five. She must be under fifty.
11 I don't think so. It can't be the 21st today. It must be the 20th.
12 I don't think so. It can't be Tuesday today. It must be Wednesday.
13 I don't think so. It can't be the 2nd today. It must be the 3rd.
14 I don't think so. It can't be cheap. It must be expensive.
15 I don't think so. It can't be easy. It must be difficult.
16 I don't think so. She can't be old. She must be young.
17 I don't think so. They can't be early. They must be late.
18 don't think so. He can't be reading. He must be sleeping.
19 I d on't think so. They can't be listening to the radio. They must be watching television.
20 I don't think so. She can't be retiring. She must be looking for a new job.
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