He was so busy that he couldn’t help ____________ the experiment.
#68774
A
doing
B
do
C
did
D
done
推荐题目
Our teacher has _________ some very difficult questions to ask us.
#75070
A
put
B
made up
C
made of
D
decided
Professor Smith is now ________ the company, which was once________ Professor White.
#66468
A
in charge of; in charge of
B
in charge of; in the charge of
C
in the charge of; in the charge of
D
in the charge of; in charge of
Lewin was interested in taking research beyond books and looking at how it could ____ real social change
#66264
A
bring up
B
bring about
C
bring in
D
bring out