— Why? Tom, your shirt is so dirty! — Mum, I ＿＿ my storeroom downstairs。
#104430
A
cleaned
B
have worked
C
was cleaning
D
have been cleaning
推荐题目
—Welcome to my home! But why didn’t you pay a visit to me last time?— I would have, but I _____ your address.
#100218
A
have forgotten
B
would have lost
C
forgot
D
had lost
It's the third time ________ late for school this week．
#101545
A
that you are
B
you are
C
when you arrived
D
that you have been
-Can we meet tomorrow afternoon?—Not in the afternoon ,I’m afraid. I____________.
#104035
A
will be working
B
am going to work
C
am about to work
D
will work
—That must have been a long trip.—Yeah, it us a whole week to get there.
#102656
A
takes
B
has taken
C
took
D
was taking
It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a few months.
#102623
A
has been developed
B
is being developed
C
is developing
D
has developed