A beam of light will not bend round corners unless______to do so with the help of a reflecting device .
#84431
A
having been made
B
being made
C
made
D
you make
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and we’ll finish the work ahead of time.
#81981
A
An hour earlier
B
If we start an hour earlier
C
Starting an hour earlier
D
Started an hour earlier
One of the sides of the board should be painted yellow，and________.
#81362
A
the other white
B
another white
C
the other is white
D
another is white
Hardly ______ off the bus when ______ an old friend who he hadn’t seen for years.
#83225
A
had he got, did he meet
B
had he got, he met
C
did he get, did he meet
D
he got, he met
Not until________,_________.
#83826
A
did she take off, I realized
B
she took off, did I realize
C
did she take off, did I realize
D
she took off, I realized
Not until he had left his friend _______ how important friendship was for him.
#81499
A
did he realize
B
he realized
C
had he realized
D
he had realized