— What are you going to do this weekend? — _____. If time permits, I may go to Shanghai with my friends.
Dark glasses can _____ your eyes ______ the sunlight.
We didn’t have much difficulty _______ the company.
I'll never forget the day _________ I was born.
Although the number of competitors ___ limited, a number of our classmates ___ eager to take part in it.
We don’t need to do __ extra work this evening. The day’s work was almost at __ end now.