The janitor(火炉工), _______ in his regular work, _______ some steam immediately the pressure went up too high.
30.The new curriculum advocates allowing students more time to participate in_______is referred to as community service.
29.It is required in a recent study suggesting the importance of teenagers’ communication with other children of the same age.
28.—You must be tired after the flight. You’d better take a good rest. —Yes, I _________. Thank you.
27.—Oh, how depressed! I am bound to lose to him in tomorrow’s competition. —Cheer up! In fact, he is___________than you!
26.—You look quite tired. —I __________ the project here in order to meet the deadline.