I looked at a few printers, and among them the one from China was ________ to use.

A. easy B. easier C. easiest D. the easiest

My cousin ________ several prizes for designing since he became an architect.

A. gains B. gained C. has gained D. was gaining

Rony will get a chance to work in this company ________ he doesn’t pass the interview.

A. unless B. when C. if D. after

________ useful app Kitty designed for the old to call a taxi!

A. What B. What a C. What an D. How

________ it with your class teacher if you can’t make the decision yourselves.

A. Discuss B. Discussing C. To discuss D. Discussed

Would you mind ________ me add some speech bubbles for the cartoons?

A. help B. helping C. helped D. to help

Reading is interesting and it also enables us ________ the world around us.

A. understand B. understanding C. understood D. to understand

- ________ can you hold your breath when you are diving?

- Only one minute.

A. How far B. How many C. How long D. How many times

The Wilsons ________ in Germany for twenty years before they moved to China.

A. live B. have lived C. were living D. had lived

To observe the wild animals, the scientists hid behind the tree and ________ silent.

A. keep B. keeps C. kept D. was keeping