_____ such heavy pollution already, it may now be too late to clean up the river.
A．Having suffered
B．Suffering
C．To suffer
D．Suffered
Visitors ______ not to touch the exhibits.
A．will request
B．request
C．are requesting
D．are requested
—Good morning, Grand Hotel.
—Hello, I’d like to book a room for the nights of the 18th and 19th.
—_____
A．What can I do for you?
B．Just a minute, please.
C．What’s the matter?
D．At your service.
The research is so designed that once ________ nothing can be done to change it.
A．begins
B．having begun
C．beginnings
D．begun
Excuse me for breaking in, ______ I have some news for you.
A．so
B．and
C．but
D．yet
—I think you should phone Jenny and say sorry to her.
— ______. It was her fault.
A．No way
B．Not possible
C．No chance
D．Not at all
News reports say peace talks between the two countries_____ with no agreement reached．
A．have broken down
B．have broken out
C．have broken in
D．have broken up
Why don’t you put the meat in the fridge? It will _______ fresh for several days.
A．be stayed
B．stay
C．be staying
D．have stayed
—Sorry, Joe. I didn’t mean to
—Don’t call me “Joe”. I'm Mr. Parker to you, and _____ you forget it!
A．do
B．didn’t
C．did
D．don’t
He didn't work hard at English before the exam, or he ________.
A. must be able to do it better B. will be able to do it better
C. would have done it better D. can do it better