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【单选题】
How can you keep the machine ()when you are away?

run
to run
running
being run
【单选题】
It is a building _______workers make many mobilephones.

there
which
where
【单选题】
The airplane?[填空] is taking off?is?making a lot of noise.

what
which
who
those
【多选题】
Too much noise may_____________ mental problems.

thank to
due to
lead to
result in
【单选题】
This machine is extremely ( ) because it runs on half-price electricity.

economic
economical
economy
economist
【单选题】
Many a customer____ about the poor quality of the washing machine.

complains
complain
are complaining
have complained
【单选题】
I have spent a lot of time_______repairing the machine.

at
/
on
【单选题】
9. No sooner _______ he arrived home than he _______to start on another journey.

has; was asked
have; were asked
had; is asked
had; was asked
【单选题】
No sooner________he arrived home than he________to start on another journey.

has;was asked
have;were asked
had;is asked
had;was asked
【单选题】
There is a real possibility that these animals could be frightened, ______ a sudden loud noise.

being there
should there be
there was
there have been