– Did you visit the famous museum?
– No. We ______ it, but we spent too much time shopping.
A. could have visited B. must have visited
can’t
have visited D. shouldn’t have visited
The countryside gives us peace and quiet, which is ______ we can’t enjoy living in the city.
A. that B.
what 
why
D. where
This problem is said _____ three times at the meeting. However, they haven’t arrived at a conclusion now.
A. to have discussed B. to have been discussed
having
been discussed D. having discussed
______ his knowledge of the mountainous country, John Smith was appointed as our guide.
A. In spite of B. On
account of 
Regardless
of D. Instead of
Production fell _____ 20% in May, _____ the same month of last year.
A. in; compared to B. by; compared to
with;
compared with D. by; comparing with
Had you listened to the doctor, you _____ all right now.
A. are B.
were 
would
be D. would have been
