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_____ you make a promise, you should keep it.
#32530
A
Though
B
Unless
C
Now that
D
Even if
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One more week, ______ we will not accomplish the task.
#32574
A
and
B
so that
C
or
D
if
—I’m going to the post office.—      you’re there, can you buy me some stamps?
#31507
A
Because
B
While
C
As
D
If
So quickly are science and technology advancing ________ is a possibility today may be a reality tomorrow.
#30322
A
which
B
what
C
that which
D
that what
________，Carolina couldn't get the door open.
#30444
A
Try as she might
B
As she might try
C
She might try as
D
Might as she try
　　　it is normal for parrots to talk, Einstein, a small bird, is unusual in that whenever she hears a new word or sound, she repeats it over and over until she masters it.
#30576
A
As
B
When
C
While　　
D
Since