Great changes __________ in this city over the past five years.
#101001
A
took place
B
have been taken place
C
were taken place
D
have taken place
推荐题目
When I entered the step-classroom (阶梯教室), the lecture __________ and the audience __________ attentively.
#101262
A
began, listened
B
was begun, was listening
C
had begun, listened
D
had begun, were listening
Every possible means  _____  .
#103742
A
has tried
B
has been tried
C
was tried
D
were tried
 He ________ two tickets for us before he arrived at the entrance of the cinema. 
#99909
A
had reserved
B
has reserved
C
was reserving
D
has been reserving
We were told not to touch the equipment in the laboratory unless ________.
#101834
A
allowed to do
B
allowing to do
C
allowed to
D
allowing to