The experiment shows that proper amounts of exercise, if  __  regularly, can improve our health.
#97485
A
being carried out
B
carrying out
C
carried out
D
to carry out
推荐题目
There is nothing interesting   at present.
#97792
A
go on
B
going on
C
to go to
D
goes on
 Mr Smith, _____of the_________speech, started to read a novel.
#98125
A
tired; boring
B
tiring; bored
C
tired; bored
D
tiring; boring