Some molecules are large enough ________ (see) under the electronic microscope.

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

To succeed in a scientific research project ________.

The more we looked at the picture, ________.

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

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

Wood does not conduct electricity; ________.

Hot metal ________ as it grows cooler.

You ________ go now. It ’s getting late.

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