Anna is not my sister. __ my cousin.
–Tom, it’s time to go to bed.-- Oh, I won’t do that _____ I finish my homework.A. if B. until C. after D when
_______ he is young, ______ he knows much.
______ he is in trouble, his best friend always helps me.
The plane was late, _________ we has to wait for half an hour.
Tony never spends money on traveling____ he likes staying at home.