——Hi, Mike．Any idea where Mary is?
——She ____ in the classroom．I saw her there just now.
| A．shall be | B．should have been |
| C．must be | D．might have been |
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 |
--- One of the Fortune Global 500 companies offered her a position, but she refused.
---_________ ? It is a very good chance.
| A．Guess what | B．So what | C．Who cares | D．But why |