According to the engineer, there remain some tests _____ before the machine is put into operation.
#91175
A
carrying out
B
carried out
C
being carried out
D
to be carried out
推荐题目
___ the room, the nurse found the tape-recorder ___. 
#95593
A
Entering; stealing
B
Entering; gone
C
To have entered; being stolen
D
Having entered; to be stolen
The power station keeps the villages ______ with electricity.
#97421
A
supplied
B
to supply
C
supplying
D
having supplied