The classroom ____________ when the teacher arrived .
A.was being cleaned
B.is cleaned
C.was cleaning
D.was cleaned

“Oh, I’m really sorry!” ~ “_____________________.”
A.It was a pleasure”
B.That’s all right
C.Thanks
D.Yes, why?

I have to announce that the manager cannot attend our party today, ____________is a pity.

A.that
B.who
C.what
D.which

Although he was _________________, he agreed to play tennis with me.
A.exhausting
B.exhausted
C.exhaustion
D.exhaustive

______(31)
A.for
B.on
C.of
D.with

________(33)
A.will
B.would
C.should
D.may

______(35)
A.day
B.time
C.while
D.ages

Which of the following is NOT the reason that makes water undrinkable?

A.acid rain
B.garbage
C.industrial pollution
D.high cost

How many countries throw industrial wastes into the Mediterranean Sea regularly?
A.exactly 16
B.exactly 15
C.nearly 16
D.less than 15

“Please don’t leave until I come back,” Sarah said.
A.Sarah told us do not leave until she comes back.
B.Sarah asked us do not leave until she came back.
C.Sarah told us not to leave until she came back.
D.Sarah said to us not to leave until she comes back.