His mother looked very tired，for she _____ the house herself all day.
#102009
A
had cleaned
B
has been cleaning
C
had been cleaning
D
has cleaned
推荐题目
The leaders from some of the countries suggested the nuclear weapon about Iran worth paying attention _______ at the international conference.
#103057
A
to be discussed
B
to being discussed
C
to discuss
D
to discussing
Look at the timetable. Hurry up! Flight 4026 ____ off at 18:20.
#100325
A
will be taken
B
took
C
takes
D
has taken
How can I ever concentrate if you ________ continually ________ me with silly questions?
#104794
A
have…interrupted
B
had interrupted
C
are…interrupting
D
were…interrupting
The hotel wasn’t particularly good. But I ________in many worse hotels.
#99891
A
was staying
B
stayed
C
would stay
D
had stayed
The boys followed the marks that they ________, until finally they found their way back to the campsite.
#100125
A
left
B
have left
C
had left
D
have been left