Play, often ______ as an activity for younger children, is still important in the social development of teenagers.
#92505
A
to see
B
seeing
C
seen
D
to be seen
推荐题目
The teacher apologized late.
#96239
A
to his students to arrive
B
to his students for arriving
C
at his students to arrive
D
at his students for arriving
(2013·北京，21)Volunteering gives you a chance ________ lives, including your own.
#89234
A
change
B
changing
C
changed
D
to change
We don’t allow _______in the office．But you are allowed _____ in the rest room．
#96638
A
smoking; smoking
B
to smoke; to smoke
C
smoking; to smoke
D
to smoke; smoking
The old man, ____________abroad for twenty years, is on the way back to his motherland.
#98541
A
to work
B
working
C
to have worked
D
having worked
Russia will soon return 174 sq km of territory on the northeast border to China, ______ more than 40 years of negotiations．
#98479
A
ending
B
ended
C
to end
D
being ended