If a computer crashes,you will lose the file you _____ on unless you save it regularly.
#104026
A
are working
B
work
C
will work
D
worked
推荐题目
——Did you find the missing couple in the mountain yesterday?——No, but we _____ to get in touch with them ever since.
#101360
A
have tried
B
have been trying
C
had tried
D
had been trying
--- Is it convenient to you if I call you up at 9 o’clock tomorrow morning? --- I’m afraid not. I _________ a speech then.
#102358
A
was giving
B
will be giving
C
am giving
D
will have given
－When will the expert come and give the lecture on economic development －Not until our program ____by the government
#100368
A
approves
B
is to approve
C
will be approved
D
has been approved
Other genetic similarities suggested they all ________ a single, common ancestor about 300 years ago.
#99611
A
had
B
have had
C
have
D
had had
The police _____ the lost boy everywhere when he suddenly turned up in a supermarket.
#102062
A
searched
B
searched for
C
was searching
D
were searching for