Only when you have obtained sufficient data ________ come to a sound conclusion.

To succeed in a scientific research project ________.

Comrade Li ________ be in Beijing because I saw him in town only a few minutes ago.

I found ________ to answer all the questions within the time given.

I know it isn ’t important but I can ’t help ________ about it.

You ________ go now. It ’s getting late.

This diploma ( 毕业文凭 ) ________ that you have completed high school.

In some schools children who prefer to read books rather than ________ football become social outcasts (被抛弃者 ).

Senior members of the staff competed eagerly ________ the position of sales manager in the company.

It was three British sportsmen who ________ banned drugs.