﹣Why are the windows so dirty?﹣Because we __________ them for a long time.A. have cleaned B. haven’t cleaned C. didn’t clean
“中国中央电视台”的英文缩写是:____________.
当别人夸你英语说的好时,你应说:
当你称呼李老师(男)时,应如何称呼?________.
-My mother is ill. -________
We should not eat ________junk food.