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Only when________ possible to settle the problem.

They are still very cautious about ______ side effect the new medicine will bring about, although the experts have tried it on about 2,000 patients.

________ going to the program If You Are the One, she knew she had to be there or her mother would be unhappy.

Not only ________learn a foreign language, but also ______ master it well.

Be careful when you cross this busy street. _____, you may get run over by a car. 

It’s not what we do once in a while ________ shapes our lives, but what we do consistently.

In my opinion, the idea of a family is much narrower than ________.

____________, and you will find him very aggressive.

It is impossible that you achieve your goal without effort,         ?

_____ on the top of the hill is a monument, dating back to hundreds of years ago.