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【简答题】

We went through a period _______ communications were very difficult in the rural areas.
A, which B, whose C, in which D, with which

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参考解析:
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举一反三

【单选题】You__________the parcel home.The shop would have delivered it if you had asked.

A.
needn’t have carried
B.
couldn’t have carried
C.
mustn’t have carried
D.
shouldn’t have carried

【单选题】水和无机盐可以进入活细胞,而有害物质不能进入活细胞,这主要是由于()

A.
细胞膜有控制物质进出细胞的功能
B.
细胞壁有保护作用
C.
细胞核含有遗传物质
D.
细胞质具有流动性