I had just stepped out of the bathroom and was busily drying myself with a towel ______ I heard the steps.
#30971
A
while
B
when
C
since
D
after
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----How soon will you send the book to me? ----It will be two days _______ you receive my book.
#33944
A
before
B
that
C
since
D
when
We were about to start out________ our friends called us up from Shanghai.
#31167
A
when
B
while
C
until
D
before
There will be a twenty-minute break during the performance, ______ people can go to the restroom or buy some snacks.
#32358
A
that
B
where
C
when
D
which