----It seems that I shall never achieve my goal, Mum.----Don’t lose heart, dear. You know___________.
________, I have to put it away and focus my attention on study this week.
________production up by 60%,the company has had another excellent year.
—Mary told me she would ______computer study. —Really? I'll try my best to ask her to _____such foolish ideas.
The old man insisted that I ____ his wallet and that I ____ with him to the police station.
____ to nuclear radiation, even for a short time, may produce variants of genes in human body.