In America．a friend's inviting you to a restaurant doesn't mean that he or she will pay for the meal you are told in advance．
#32275
A
unless
B
if
C
although
D
until
推荐题目
The school rules state that no child shall be allowed out of the school during the day, __________ accompanied by an adult.
#32564
A
once
B
when
C
if
D
unless
39.When you read the book, you’d better made a mark ____ you have any questions.
#80395
A
at which
B
at where
C
place
D
where
He always helps us ________ he is doing when we turn to him for help.
#33389
A
whenever
B
whatever
C
whichever
D
however