问题

Argon, can I borrow your textbook— Sorry, not _____ you help make a note of what the teacher says.

A:unless
B:if
C:when
D:since;

正确答案是：

同类题型

The film we saw last night is called The Bridges of Madison County, which is _____ a novel by Robert James.

Tom get addicted to drinking wine.As a result,he________as a failure in his career.[ ]

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__________ are the pants —Oh, the black pants They are only ten dollars.