北京开放大学大学英语（2）5.3 小测试

题目1
正确
获得1.00分中的1.00分
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题干
You can use in the present to express necessity.

选择一项或多项：
a. must
b. have to
c. have got to
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正确答案是：must, have to, have got to
题目2
正确
获得1.00分中的1.00分
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题干
Only can be used to talk about things that were necessary in the past.

选择一项：
a. must
b. have to
c. have got to
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正确答案是：have to
题目3
正确
获得1.00分中的1.00分
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题干
_________is often used to talk about rules or laws. It is stronger than have (got)to.

选择一项：
a. Must
b. Have to
c. Have got to
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正确答案是：Must
题目4
正确
获得1.00分中的1.00分
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题干
You can only use in the negative.

选择一项：
a. must
b. have to
c. have got to
反馈
正确答案是：have to

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