Our school had about 20 notebook computers but only one-forth_____used regularly. Now we have 50 working all day long.

If you don’t try your best to learn all subjects, you will ___ behind.

Is your ball on the chair— No. It’s_____the chair.

Nowadays, a large number of women, especially those from the countryside, ________ in the clothing industry

Emergency line operators must always _____ calm and make sure that they get all the information they needto send help.[ ]