语法与词汇
1.
_____this is only a small town, it's crowded with tourists who come here all year round.
A、
Since
B、
Unless
C、
Once
D、
Although
【正确答案】
D
【答案解析】
考查连词的用法。although虽然，正符合上下句的转折关系；since自从；unless除非；once一旦。
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