Every few years, the coal workers their lungs X-rayed to ensure their health.
#102390
A
are having
B
have
C
have had
D
had had
推荐题目
Nothing but some ancient Chinese coins _______ in the sunken ship since they began the exploration.
#102516
A
were found
B
was found
C
have been found
D
has been found
---Do you have any news about Bob? ---Yeah. We ______ each other quite a lot recently.
#99888
A
have been seeing
B
had been seeing
C
see
D
have seen
The young man，who by then ___ admission to university，decided to do some part-time jobs to gain more practical experience．
#100177
A
gained
B
was gaining
C
has gained
D
had gained
—Car prices have been going down sharply in the last 20 years.—It’s not surprising because the law of market _____the price of a product
#101026
A
is controlling
B
controls
C
has controlled
D
controlled