问题
选择题
—Are you going to stay overnight?
—Not _____ it’s really necessary.
A.unless
B.if
C.until
D.since
答案
答案:A
这题是考查的省略句,完整的说法是:I’m not going to stay overnight unless it’s really necessary。句意是:--你打算过夜吗?--不会,除非有必要。