He devoted all the time _____ his research .
#92715
A
to do
B
doing
C
to doing
D
did
推荐题目
I planned ________ to see you last week, but I was ill.
#98412
A
to have come
B
to come
C
to be coming
D
to have been coming
--- Who should I send this message to ? --- The mayor is the one ____ ?
#98038
A
to send it
B
to be sent
C
for sending
D
to send it to
_______ many times, he finally understood it.
#96770
A
Told
B
Telling
C
Having told
D
Having been told
Everyone in this country should work hard and do what they can _____ against national smog.
#89465
A
fight
B
fought
C
fighting
D
to fight
Paper books still play an important role in the US textbook market, with digital textbooks __________ less than 5 percent of the total.
#97580
A
composing of
B
making up
C
consisted of
D
accounted for