问题
What were you doing ________ your mother was cooking supper
A:went to
B:has gone to
C:has been in
D:has been to;
B:has gone to
C:has been in
D:has been to;
正确答案是：
同类题型
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has two stomachs — one foritself, one for others—–Really Quite interesting I ____anything about it