．It’s best to plant trees(植树)in _____．

He will come to understand your efforts sooner or later. It's just a matter of_______.

— What do you think of the human and the computer?—A human ____can do some things better than a computer, for example, creating new ideas.

Lucy enjoys dancing. It’s  one  of  her_______.

—The shop is ______ on Saturday and Monday.—I see.I’ll come here to buy a pen on Monday then.