问题
What were you doing when I called you at 8 p.m. yesterday —I the piano at that time.
A:play
B:is playing
C:played
D:was playing;
B:is playing
C:played
D:was playing;
正确答案是：
同类题型
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It is said that there’s over 5, 000 kinds of languages in the world.
Are you willing to study abroad one day — It sounds attractive, but it still worries me.