--- Why? Tom, your shirt is so dirty! --- Mum, I ______ my storeroom downstairs.
#104102
A
cleaned
B
have cleaned
C
was cleaning
D
have been cleaning
推荐题目
We must ________ every chance we have to improve our communicating ability.
#99651
A
take care of
B
get along with
C
make use of
D
think highly of
In some parts of the world, tea _______ with milk and sugar.
#104046
A
is serving
B
is served
C
serves
D
served
Although the Eiffel Tower ______ to last for 20 years, it is still standing today.
#100117
A
has designed
B
had designed
C
is designed
D
was designed
If you ________ Beijing Duck，I'd like to treat you to a meal at a famous duck restaurant．
#104939
A
didn't try
B
don't try
C
haven't tried
D
hadn't tried
---- Have you finished your composition already?---- Yes．I _____ it in less than ten minutes.
#102500
A
have finished
B
finished
C
will finish
D
had finished