问题

e dropped_______ “s” in the word “acros”.—Oh, ______letter “s” should be doubled like this“across”.
A:a ; a
B:an ; a
C:an ; the
D:the ; the
B:an ; a
C:an ; the
D:the ; the
正确答案是:
同类题型
. ——Ireminded you not to forget the appointment. ——______.
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Suddenly the small boy stopped and bentdown as if to _____ something.
Usually I don’t allow________in my office,but yesterday I allowed him________ here.