问题

Look! The lights in the classroom are still on.—Oh, I forgot ________.
A:turning them off
B:turn them off
C:to turn them off
D:having turned them off;
B:turn them off
C:to turn them off
D:having turned them off;
正确答案是:
同类题型
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I togo for a walk, but someone called and I couldn’t get away.
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