Unit 3 Grammar Review

The students work hard _________ their English.

• to improve

• to improved

• too improve

• to improving

The mission was started __________ a colony on Mars.

• to build

• two build

• build

• to go

People travel all over the world _________ new cultures.

• and

• in order to

• to experience

• to travel

Which sentence is NOT an infinitive of purpose?

• She runs to stay healthy.

• I saved my money to buy a new car.

• He drives his car to avoid walking.

• He loves to drive his car everywhere.

I wash my hands _________ getting sick.

• so

• in order to avoid

• to avoiding

• avoid

American astronauts ________ on the moon in 1969.

• have landed

• has landed

• landed

• land

12 people __________ on the moon.

• have walked

• walked

• has walked

• have walke

______ you _______ about going to Mars?

• Has / thought

• Have / thought

• Have / think

• have / thought

I ________ to Antarctica twice, and I hope to go again in the future.

• went

• has been

• have gone

• have been

I __________ to the moon three times last year.

• Went

• have been

• have gone

• have went