问题
Mr Smith is ______ old man and he usually walks his dog after ______ supper.
A:a; the
B:an; a
C:an; 不填
D:the; 不填;
B:an; a
C:an; 不填
D:the; 不填;
正确答案是：
同类题型
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The number of people ________ this happens isnot very large.
Do you have a minute? I’ve got something to tell you—OK, you make it short[ ]