If you have really been studying English for so long, it’s about time you ______ able to write letters in English.

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问题 If you have really been studying English for so long, it’s about time you ______ able to write letters in English.

选项 A、should be
B、were
C、must be
D、are

答案B

解析 it is(about)time(that)是一个虚拟语气句型,所跟从句的谓语动词用一般过去式,故B项were为答案。
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