Could you please me tell me ________?
When you have difficulty, do remember to _________. Two heads are better than one.
Listen! I hear someone________ the door.
—I’m going to Hainan with my aunt for my holiday after the exam.—_______.
—What do you think of Liu Huan?—Oh, he is my favorite singer. I think no one can sing________.
Everybody should remember it is not _________ to swim in the river alone.