There is a feeling in me _______ we’ll surely find a cure for Aids.

I don’t know ______ or not the books _____ to the homeless children next month are really useful.

The time isn’t far away ______ you will have to take the college entrance examination．

—Did he come back late last night?
—No．It was not yet eight o'clock _____________ he arrived home．

____ no cash for food, he broke into an old woman's house, hoping to steal some money.

This dictionary, a few pages __________ are missing, is of no use.

______ you think you can or not, you must finish the project before Friday.

It was evening ______ they reached Haikou City.

Li Yang, the founder of Crazy English, says that he copies it down _______ he comes to a sentence.

_____you’ve grown up, you must stop this childish behavior.