Night ________ (fall), we hurried home.

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

Matter is the name ________ (give) to everything which has weight and occupies space.

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

He fell asleep immediately last night; he must ________ (be) very tired.

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

The floor does not look so bad when ________ (sweep) clean. 

A beam of light will not bend round corners unless ________ (make) to do so with the help of a reflecting device

This test ________ a number of multiple choice questions.

he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.