It was ____ the old worker came that we ____ the  experiment.
#73098
A
until; didn’t begin
B
not until; began
C
until; began
D
not until; didn’t begin
推荐题目
I have two grammars, ______are of great use. 
#73806
A
all of which
B
either of which
C
both of that
D
both of which
If you _____ at noon, you ____ the feeding of animals.
#41222
A
arrive at there; will see
B
will arrive there; will see
C
arrive there; will see
D
arrive in there; see