—Look! Somebody ______the blackboard．—Well, it wasn't me．I didn't do it．
#101314
A
is cleaning
B
was cleaning
C
had cleaned
D
has cleaned
推荐题目
It is the third time that he ____ the first prize in the competition.
#101292
A
wins
B
won
C
has won
D
to win
The government has taken some measures to prevent more trees from _____.
#100712
A
cutting down
B
cut down.
C
being cut down
D
been cut down
You can’t imagine what great trouble the doctor had ______ the patient.
#103047
A
treats
B
treating
C
to treat
D
treated
Barbara is easy to recognize as she’s the only one of the women who _____ evening dress.
#102672
A
wear
B
has worn
C
have worn
D
wears
The school will have a kite flying competition next Saturday, and all the students to bring a kite with them.
#100653
A
expect
B
expected
C
are expected
D
have been expected