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Which sentence refers to an unfinished state? Choose as many as you think are right.

A. She lives in Birmingham.
B. She’s been living in Birmingham for five years.
C. She’s lived in Birmingham for five years.
D. She lived in Birmingham for five years.

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Which of these sentences is in the present perfect continuous tense? Choose as many as you think are right.

A. I’ve been cleaning the house all morning.
B. I’ve cleaned the bathroom already.
C. Why are you cleaning the children’s bedrooms?
Did you clean the kitchen before I got here?

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Which of the highlighted verbs could be in the present perfect in this dialogue? Choose as many as you think are possible to say in the present perfect.– I’m sorry tosayyour wifehadan accident.– Oh no! Whathappened?– Shewasin a car crash.–Isthe car OK?– I’m afraid not!

A. happened
B. had
C. say
D. was
E. is

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If your friend says, “I’ve eaten all five cakes,” which sentences describing present consequences are likely to be true?

A. Now there are no cakes.
B. Your friend is probably not hungry.
C. There are five cakes left.
D. Your friend feels ill.
E. Your friend wants to eat more.
F. The cakes are delicious.

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带传动的中心距与小带轮的直径一定时，若增大传动比，则小带轮上的包角（）。

A. 减小
B. 增大
C. 不变
D. 与传动比无关

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Which sentence refers to an unfinished state? Choose as many as you think are right.

A. She lives in Birmingham. B. She’s been living in Birmingham for five years. C. She’s lived in Birmingham for five years. D. She lived in Birmingham for five years.

Which of these sentences is in the present perfect continuous tense? Choose as many as you think are right.

Which of the highlighted verbs could be in the present perfect in this dialogue? Choose as many as you think are possible to say in the present perfect.– I’m sorry tosayyour wifehadan accident.– Oh no! Whathappened?– Shewasin a car crash.–Isthe car OK?– I’m afraid not!

If your friend says, “I’ve eaten all five cakes,” which sentences describing present consequences are likely to be true?

带传动的中心距与小带轮的直径一定时，若增大传动比，则小带轮上的包角（）。

A. She lives in Birmingham.
B. She’s been living in Birmingham for five years.
C. She’s lived in Birmingham for five years.
D. She lived in Birmingham for five years.