If you sit in a chair _____a long time, your back may begin to hurt.
| A．at | B．in | C．on | D．for |
The world’s population is getting larger and larger, so scientists are trying to ______ new ways to solve the food shortage.
| A．keep up with | B．come up with |
| C．make up with | D．catch up with |
He finds watching movies ______because the people speak too quickly.
| A．frustrating | B．frustrated | C．frustrate | D．frustration |
E-mail is very popular today. People hardly post letters, _________?
| A．did they | B．do they | C．didn’t they | D．don’t they |
—Who helped Jessie with her English?
—_______, she taught herself.
| A．Anybody | B．Somebody | C．Nobody | D．Everybody |
— You look so healthy!
— Yeah, I like eating apples. An apple a day keeps the _______ away.
| A．teacher | B．worker | C．farmer | D．doctor |