The twins look the same, but they are really different.
----- Could you tell me when Mr. Li ________ in Huaibei?---- Sure..When he ________, I’ll call you.
---- David, look at the man in white over there.Can you tell me _______ ? ----He is a doctor.
---We’ll do what we can ____English well this term.---It’s high time for you to work hard.
—He didn’t go to the lecture this morning, did he?— _____ .Though he was not feeling very well.
They preferred ______ in bather than _____ horses.