—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

— Would you like to go to the cartoon show with me?— It sounds like fun, ______I’m too busy.

#55215

for

but

Stand over there, ______ you will get a better view of the whole city.

#58378

and

but

though

I will never forget that terrible accident _______ it happened so long  ago.

#58094

even though

so that

only when

ever since

_______ he did well, he was never top of his class.

#55253

Although

But

Because

Since

--- Lily isn’t here today, What’s happened to her? ---She stays at home       her illness.

#58306

because

because of

so that