--Why does the lake smell terrible? -- Because a large amount of water_______.
#99621
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
The teacher said that Columbus _______America in 1492.
#102954
A
discovered
B
found
C
had discovered
D
had found
Nobody in the class except you and me _____ to the principal about the air quality problems.
#104686
A
has complained
B
have complained
C
complain
D
complaining
—Ouch!You hurt me!—I am sorry.But I___any harm.I___to drive a rat out.
#104062
A
didn’t mean;tried
B
don’t mean;am trying
C
haven’t meant;tried
D
didn’t mean;was trying
When we first met on a train in 2000, we both felt immediately that we _____each other for years.
#102366
A
know
B
had known
C
know
D
have known
— What’s that terrible noise ?— The neighbors _____ for a party.
#105005
A
have prepared
B
are preparing
C
prepare
D
will prepare