If it ______________ tomorrow, I would stay at home watching TV.

I can hardly believe my eyes. Is that you, Lucy—Yes. It has been almost 20 years ______ we were together.

I’d like _____ these books ______ the classroom.—Let me help you.

The scientist’s last words _________us thatwe should protect the environment around us.

. —Li Ping often watches _______ English TV news in her spare time.—No wonder she has _______ command of English.