If ____ unsolved, the problem of food safety may lead to more serious results.
#94614
A
making
B
remained
C
left
D
taking
推荐题目
The April Fools' tradition is said ________ in the sixteenth century.
#88775
A
to start
B
to be starting
C
to be started
D
to have started
________in his test papers，he didn’t notice my coming.
#93747
A
Having absorbed
B
Absorbed
C
Absorbing
D
To be absorbed
I went to bed early _____ the sleep lost last night.
#96168
A
to make up
B
gaining back
C
making up
D
to gain
______ me the truth, or I’m not going to leave the room.
#90035
A
Tell
B
Telling
C
To tell
D
If you tell
If not tired from work, I will spend some time in my study every evening.
#92517
A
locking
B
locked
C
having locked
D
being locked