-Why does the Lake smell terrible? -Because large quantities of water .
#104968
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
Not only ____ the jewelry she ____ been sold for her son's gambling debts but also her house．
#104220
A
is；has
B
has；had
C
has；has
D
／；has
The car ____ at the present speed until it reaches the foot of the mountain at about ten o'clock tonight.
#99039
A
went
B
is going
C
goes
D
will be going
—How many times have you been to China?—In fact, it is the first time that I__________ here.
#100361
A
was
B
have been
C
had been
D
am
--- Any news about the fire?--- Nearly 20 people ______ from the burning building by now.
#100863
A
rescued
B
have been rescued
C
have rescued
D
were rescued
Having broken the traffic rules, Tom _____from driving for a year.
#103242
A
has banned
B
had banned
C
is being banned
D
has been banned