If ____unsolved, the problem of food safety may lead to more serious results.
#89868
A
left
B
making
C
remained
D
taking
推荐题目
How could he get the plan _____ without any one to support him?
#98853
A
to carry out
B
carry out
C
carrying out
D
carried out
Please tell me the way you thought of _______ the garden.
#96657
A
take care of
B
to take care of
C
taking care of
D
to take care
The house  _________  now used to be a storeroom.
#97177
A
to be torn open.
B
torn down
C
being torn down
D
tearing open