—Is your brother at home?—No. He ________ the library. He hasn’t come back yet.
We should often help _______poor.A. a B.不填 C. the
— Could you look after my dog for me while we're away?— .A. Yes, please B. No, I'm not C. With pleasure
I don't know if she to my birthday party tomorrow. If she , I'll be very happy.A. comes; comes B. will come; comes C. comes; will come
— Susan, would you like to go hiking with us this afternoon?— I'd love to, but I study for a test.A. may B. have to C. can
—What are you doing?—I'm the key to the door.A. finding out B. looking after C. looking for