If ________ to look after luggage for someone else, inform the police at once.

A. asked B. to ask

C. asking D. having asked

Shortly after suffering from a massive earthquake and ________ to ruins, the city took on a new look.

A．reducing B．reduced

C．being reduced D．having reduced

Laura was away in Paris for over a week.When she got home, there was a pile of mail ________ for her.

A．waited B．to wait

C．waiting D．was waiting

Lionel Messi ，________the record for the most goals in a calendar year，is considered the most talented football player in Europe.

A．set B．setting

C．to set D．having set

The sun began to rise in the sky, ________ the mountain in golden light.

A. bathed B. bathing

C. to have bathed D. having bathed

You cannot accept an opinion ________ to you unless it is based on facts.

A. offering B. to offer

C. having offered D. offered

When we saw the road ________ with snow, we decided to spend the holiday at home.

A. block B. to block

C. blocking D. blocked

________ basic first－aid techniques will help you respond quickly to emergencies.

A. Known B. Having known

C. Knowing D. Being known

_______ the course very difficult, she decided to move to a lower level.

A. Find B. Finding

C. To find D. Found

Volunteering gives you a chance ________ lives, including your own.

A. change B. changing

C. changed D. to change