Some driverless cars use ________ energy, so they are good for the environment.

Visitors to the city often want to get a photograph ________ on a rickshaw.

Surprisingly, ________ broke the world's record after two attempts.

We met each other at my grandparents' house three years ago and ________ friends ever since.

I usually go by train, even though the car ________ is a lot quicker.

You need to be careful when walking ________ the street.

________ to win and lose is important in children's education.

Booking in advance can be ________ than paying on the day of travel.

The Andes is a dangerous mountain, but Simpson and Yates were very experienced climbers and ________ about the challenge.

When I last ________ Jane, she ________ to find a job.

Is it acceptable to touch ________ person on ________ shoulder in a conversation?

Everyday my grandmother ________ green tea, but today she ________ black tea.

Nearly half of its total energy comes from ________ energy like wind and sun.

The ________ in the stadium all cheered the athletes.

The tourist company was ________ down the street than I had thought.

When Marjan was a teenager, her father soon saw how much ________ cycling.

I prefer visiting my relatives by bicycle or ________ because they live near my house.

I don't think there's a problem with having ________ sports in school.

She was an admired writer for years before she ________ the Nobel Prize for Literature.