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The first thing we should do is to master the basic grammar.A.whichB.thatC.asD.o

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The first thing we should do is to master the basic grammar.A.whichB.thatC.asD.o

The first thing ________ we should do is to master the basic grammar.

A.whichB.thatC.asD.of which

试题答案

B

解析