——It is a long time _____I saw you last. ——Yes.And it will be a long time _____ we see each other again.
#92453
A
when; before
B
after; when
C
since; before
D
since; until
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The invention of spaceships makes ________ human beings to travel to the moon.
#94143
A
that possible for
B
it possible for
C
it likely of
D
that probable of
___ we know, in a chemical change, energy cannot be created, ____.
#94863
A
Which, nor can it be destoyed
B
As, neither it can be destroyed
C
As, neither is it able to be destoryrf
D
What, nor is destoryed