Before a problem can be solved，it must be obvious____the problem itself is.

Is there a bar around ________ I can have something to eat

I shall never forget the days_________ I lived with my parents as a child, _________ has a great effect on my life

I hear there will be _____talk on English study tomorrow morning.—Do you mean ____ speech our teacherasked us to listen to

Did you catch the first subway this morning—No, I didn’t. It had started moving __________ I could get on it.