The shop ________ from Monday to Friday. It’s ________ at weekends.
| A．opens; closes | B．is open ; closes |
| C．is open ; closed | D．opens ; close |
—Why do you look so tired?
—Because we ________ for three hours without stopping.
| A．work | B．worked |
| C．have worked | D．were working |
We won’t start the meeting ________ the teacher arrives.
| A．though | B．until | C．while | D．and |
The workers are trying to ________ what’s wrong with the machine.
| A．look for | B．care for | C．find out | D．take out |
Internet is ________ used by people, especially by young people.
| A．deeply | B．widely | C．hardly | D．highly |
It’s so fine. Why not ________ outdoors?
| A．play | B．plays | C．playing | D．to play |