Professor Smith, along with his assistants, _________on the project day and night to meet the deadline.
#102351
A
work
B
working
C
is working
D
are working
推荐题目
Great changes __________ in this city over the past five years.
#101001
A
took place
B
have been taken place
C
were taken place
D
have taken place
A Sichuan government official expressed their thanks through CCTV for the aid they ______ in the last three years.
#102244
A
would receive
B
are receiving
C
have received
D
had received
―Look! It looks as if it _______ going to rain. We must hurry.―OK.
#104510
A
was
B
is
C
were
D
will be
It is reported that very little use of these waste materials_______ in the past decades．
#99386
A
was taken
B
was made
C
has been made
D
has been taken