John ___ be a basketball player.He’s much too short.

A.
may
B.
mustn’t
C.
can't
D.
should

They decided to leave the waiter a big _____ because the food and service had been excellent.

A.
note
B.
reward
C.
tip
D.
gift

It doesn’t matter how much loss we have suffered; just avoid _____ the mistake again

A.
to make
B.
being made
C.
having made
D.
making

After his father’s retirement, he ______ the whole business.

A.
took up
B.
took over
C.
took place
D.
took down

Just as sound travels through the air in waves, electricity travels through the air in ______ radio waves.

A.
what is called
B.
which is called
C.
what it is called
D.
which it is called

T he problem of the present world is that those who are imaginative have little experience those who are experienced have weak imagination

A.
unless
B.
although
C.
because
D.
while

When _____ comes to saving energy , big changes start with small steps , like turning off the lights.

A.
that
B.
this
C.
it
D.
one

Mr Jones, a professor, ___________ for his excellent lectures, is popular with his students.

A.
known
B.
knowing
C.
to be known
D.
having known

____that she didn’t do a good job,I don’t think I am abler than her

A.
To have said
B.
Having said
C.
To say
D.
Saying

He was busy writing the exam paper , only ___once in a while to check the time.

A.
to stop
B.
stopping
C.
to have stopped
D.
having stopped

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