单选题
12.
If you have really been studying English for so long, it's about time you______able to write letters in English.
A、
should be
B、
were
C、
must be
D、
are
【正确答案】
B
【答案解析】
it is high(about)time(that)sb．did sth．是固定结构，如：It’s high time that youstarted working．你早该开始工作了。故答案为B。
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