It _______ long before we ______ the result of the experiment.
#103038
A
will not be; will know
B
is; will know
C
will not be; know
D
is; know
推荐题目
 We won’t start the work until all the preparations __________.
#99078
A
are being made
B
will be made
C
have been made
D
had been made
Although the Eiffel Tower ________ to last for 20 years, it is still standing today.
#99837
A
has designed
B
had designed
C
is designed
D
was designed
Hurry up; it is required that we ______ at six. 
#102875
A
will arrive
B
arrived
C
arrive
D
would arrive
The manager was concerned to hear that two of his trusted workers _____.
#101325
A
are leaving
B
have left
C
were leaving
D
will leave