J3 Unit 3 Expressions + -ing

The book is worth ___. Will you buy a copy?

• buy

• to buy

• buying

There will be robots ___ in one's family in the future.

• help

• to help

• helping

It is not easy ___ a new language after reaching the age of 18.

• learn

• to learn

• learning

It was kind of her ___ the seat to the elderly.

• give

• to give

• giving

Our barbecue gathering is coming soon. We are busy ___.

• prepare

• to prepare

• preparing

In the clear blue sky, there are many boys and girls ___ in the playground.

• play

• to play

• playing

This old lady goes ___ every day. She keeps this habit for some years.

• swim

• to swim

• swimming

Students are busy ___ for the coming English Test.

• prepare

• to prepare

• preparing