There was ____ time _____ I hated to go to school.

I’m sorry you’ve been waiting so long, but it’ll still be some time ___ Brian gets back.

The countryside gives us peace and quiet, which is ___ we can’t enjoy living in the city.

______ might be expected,the answer to the question was very mixed.

_______ difficulties we may com across, we'll help one another to overcome them.

I have kept that picture ______ I can see it every day,as it always reminds me of my university days in London.

The fire was finally brought under control,but not ________ great damage had been caused.

Advertising is different from other forms of communication _________the advertiser pays for the message to be delivered．

The question occurred to me ______ we were to get the machine needed．

How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?