When you are learning English, use it, ________ you won’t make great progress.
“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.