—May I go swimming this afternoon? — I'm afraid not ______

—May I go swimming this afternoon? — I'm afraid not _______ you have finished your homework.

#55374

unless

because

but

推荐题目

 He realized his mistakes and took action to reduce the loss _________ it was too late.

#55986

until

when

before

--- This history book is of great value. --- Exactly. ____________ can be enjoyed from it ____________ you have a deep understanding of it, however.

#55378

Nothing; unless

Few; till

Something; until

Little; since

 Three years has passed _________ they came to this school.

#55246

since

for

when

before

We never doubt______ Bill is honest.Because he never tell lies.

#56152

that

whether

that if

Our team tried our best, ________ we failed the match at last.

#55973

but

and

while

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