Tigers live as a family baby tigers are 2-3 years old.[ ]A. afte

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Tigers live as a family baby tigers are 2-3 years old.[ ]
A. after
B. when
C. while
D . until

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举一反三

he can"t sing English songs, he can speak English well. [ ]
A. Although; but
B. But; although
C. Although; /

题型：专项题难度：| 查看答案

I"m not very strong, ____ I usually exercise. [ ]
A. because
B. and
C. although

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— How long has the nationwide ban (禁止) on plastic bags been put into practice?
— the beginning of June. [ ]
A. Behind
B. Since
C. For
D. At

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_____ Sandy was playing the piano, someone knocked at the door.

[ ]

A: While
B: Before
C: After
D: Until

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—Why is the woman worried?
— she lost her son. A. So
B. Since
C. Because
D. For

题型：0122 期末题难度：| 查看答案