--- You don't know what great difficulty I had _____ to get the two tickets.--- But the film is really worth_______ twice.
Liu Lei is_____better at Chinese than Liu Ying.
Who knows the answer______the question?
I think you should tell your partner how ______ popcorn.
---May I have ______ piece of bread with butter? I’m not full. ---Certainly. Here you are.
---______will you be back to the office? ---In half an hour.