What a pity! Considering his ability and experience, he ____ have done better.

--Let’s go to the Tian’anmen Square by taxi. --Oh, it’s not far from here. We_______ take a taxi.

A hot balloon blew up in Egypt. There ________ something wrong with the quality of it.

—I want to know if I _______________smoke here. —No, you ______________. Could you see the sign “ No Smoking” there?

Sometimes smiles around the world ________ be false, hiding other feelings like anger, fear or worry.