_____ the development of the country, most people are living happily.

ave made a phone call to you,___________ your telephone number．— That’s all right．What was up then

He couldn’t have finished his homework last night, _________he?—No. You see, he is busy doing it now.[ ]

Parents ________ good conditions ________ us. We should thank them.

Your son has kept _________ fortwo hours. You’d better ask him to have a rest.