—Mary，I don’t know ____ you can come tomorrow morning.—No problem! I’ll be here _____I’m free then.
#55784
A
if；if
B
if; whether
C
whether；till
D
whether；until
推荐题目
You won’t feel happy at school ___ you get on well with your classmates.
#55528
A
though
B
when
C
unless
D
because
---_______does your mother watch the Talk show? ---Once a week.
#56342
A
How long
B
How often
C
How soon
D
How many
I am sure I will do it well __________you give me this chance.
#58316
A
if
B
before
C
until
D
though