There are many people _____only on-line activity is sending and receiving e-mail. [ ]

Jerry did not regret giving the comment but felt ________ he could have expressed it differently.

The article is too long and should be ______ by half .

Are you pleased with what he has done?—It couldn’t be____. Why didn’t he put more effort into his work?

Is Li Lei at school today—No, he is at home _____ he has a bad cold.