Never stand up ________ you are asked to.
#58222
A
if
B
since
C
unless
D
when
推荐题目
Learning to write is learning to think. You don’t know things clearly _______ you can write them down.
#56362
A
unless
B
if
C
since
D
whether
—_____________________? —She is a nurse.
#55884
A
Who is your mother?
B
Is your mother a nurse?
C
Where is your mother？
D
What does your mother do？
_______ you do, don’t miss this exhibition, for it’s so hard for me to get the tickets.
#56127
A
Whatever
B
However
C
If
D
Who
I met a friend of mine _________ I was walking along the street.
#56938
A
before
B
as
C
because
D
since