--Must I clean the classroom now, Miss Wang?--No, you needn’t . It                by Bill. 
#41980
A
is cleaning
B
should be clean
C
was cleaned
D
has been cleaned
推荐题目
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
#42209
A
collected
B
had collected
C
has been collecting
D
had been collecting
I _____________ his letter for a week.
#41810
A
heard from
B
have received
C
have had
D
have got
-- __________ you __________ breakfast?    -- Yes, I had it at 6:30. 
#41554
A
Had; had
B
Have; had
C
Are; having
D
Were; having