27.How long do you think it will be________China becomes a rich and harmonious country?
A.before | B.after | C.since | D.When |
This chemical material is very toxic. So put it ______ the children’s reach.
A.by | B.beyond | C.within | D.from |
The central heating system of this office building is down and several workers ______ it right now.
A.had repaired | B.have repaired | C.repaired | D. are repairing |
China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
A.hadn’t acted | B.haven’t acted | C.don’t act | D.won’t act |
In recent years the consumption of aspirin _______ enormously in America.
A was increasing B. has increased C. had increased D. will be increasing
–Would you be kind enough to help me with my homework at one o’clock this afternoon?
-- . Will two o’clock be OK?
A.Sure, it’s up to you | B.Sure, no problem |
C.Sorry, I can’t make it | D.Sorry, I’m not available today |