When I try to find ______that prevent so many people from taking part in the program, it seems to me that there are two main causes.
#4996
A
why it does
B
what it does
C
what it is
D
why it is
推荐题目
 No sooner ______ on board the train than it______ to move.
#4621
A
did he go; had started
B
he went; started
C
had he gone; started
D
he had gone; had started
--- Do you really mean to prepare our lecture two months in advance? --- Sure. Anyway,  ___________
#4808
A
a good beginning is half done.
B
a bird in the hand is worth two in the bush.
C
a fall into a pit, a gain in your wit.
D
the early bird catches the worm.
.The teaching building is _________ by many trees, some ______ over 30 metres.
#4739
A
surrounded, measuring
B
surrounded, measured
C
surrounding, measured
D
surrounded, measure
________by the beauty of the West Lake, Mary decided to stay for two more days in Hangzhou.
#4728
A
Attracting
B
To be attracted
C
Attracted
D
Having attracted