I always come _____ school _____ foot.

If there was a technical failure, Gagarin might never get __________ to the Earth.

Are you aware ________the time?

Four-fifths of the world's computers use programs (at/in/on/about) English.

On behalf_____________ our group, he made a speech at the meeting.

Share these sweets .......... the five children and see that each one gets a fair share.

China became the third country in the world to be able to independently carry __________ manned space flights.

_________ the end of the film, the heroine was reunited with her family.

This style of architecture is typical ___ the Colonial period.

I shall be ready .......... a moment.

We just rested _________ a short time.

We had a lot of problem with our car. ........., we sold it and bought another one.

Jane doesn't spend much money______ clothes.

Those books deal mainly_______ tropical plants.

Linda is a keen photographer. She likes taking pictures ......... people.

When are you leaving ......... Singapore? This week or next week?

Ann looked ______ the mirror and admired her new blouse.

Toxic chemicals in the air and land have also driven many species ______ the verge of extinction.

The flood was responsible __________ damaging the crop.

We benefit greatly ____________the medicines and other products that biodiversity provides.

Look at the leaves ............. that tree. They’re ........... a beautiful colour.