单项选择题

（）it is not his responsibility to dothat，he said he would help.

A.Although
B.As
C.Since
D.Unless

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单项选择题We had a long way to go so we decided to（）early.

A.set on
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C.set off
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单项选择题--How much did this set of furniturecost？--I forgot （）.

A.how much it costs
B.how much did it cost
C.how much it cost
D.how much does it cost