Choose the correct answer:
There was explosion in technology.......... the beginning of the 20th century.
A.in
B.at
C.through
D.on

Choose the correct answer:
I’ll just............... you through to our research department. Please hold on.
A.go
B.get
C.put
D.bring

Choose the correct answer:
Alex’s electricity was cut............... because he forgot to pay the bill.
A.down
B.into
C.off
D.at

Choose the correct answer:
Scientists are trying to................ out ways to reduce pollution from aircraft.
A.get
B.come
C.find
D.work

Choose the correct answer:
A lorry had............ down on the motorway and we had to wait for over an hour.
A.broken
B.got
C.gone
D.taken

Choose the correct answer:
We had our car serviced and it seems there’s a problem with the..................
A.machine
B.motor
C.generator
D.engine

Choose the correct answer:
I’ve............. it in at the mains but it still doesn’t seem to work.
A.worked
B.turned
C.narrowed
D.plugged

I spent my happy ..................... in the countryside. (child)
A.childhood
B.childless
C.childishly
D.childishness

Choose the correct answer:
I’m afraid the problem with your washing machine is the...................
A.engine
B.motor
C.electricity
D.technique

Choose the correct answer:
At the start of 20th century, it became............. that science was becoming more complicated and more expensive.
A.clear
B.TRUE
C.accurate
D.actual