Thomas Alva Edison didn’t “invent” the light bulb, but rather he ______ a 50 –year –old idea, which is not well –known.
#81506
A
improved upon
B
take down
C
put up
D
break away
推荐题目
Scientists are convinced _____the positive effect of laughter _____physical and mental health．
#70992
A
of ;on
B
by; in
C
of ; at
D
on ;at
The girl was made to ______ a man she didn’t like at all.
#73762
A
get married
B
marry with
C
marry
D
be married with
To keep healthy, Professor Johnson ________ cycling as a regular form of exercise after he retired.
#65698
A
carried out
B
caught on
C
took up
D
made for