The research is so designed that once _____ nothing can be done to change it.
#95029
A
begins
B
having begun
C
beginning
D
begun
推荐题目
—Would you please help me with the box ?—_________
#95218
A
Yes , please
B
No , please don’t
C
With pleasure
D
My pleasure
Entering the reading room, ______.
#93589
A
Mike and Tom were found seated quietly, doing their homework
B
Mike and Tom were found seating quietly, doing their homework
C
he found Mike and Tom seating quietly, doing their homework
D
he found Mike and Tom seated quietly, doing their homework
In the past few years, __________much improvement in the traffic.
#92127
A
there has been
B
there has had
C
there have been
D
there had been
It’s nice _______ me with my lessons.
#94732
A
of you to help
B
for you to help
C
of you helping
D
for you helping