---The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
---____ my students have a try?
| A．May | B．Must | C．Will | D．Shall |
A child ______ parents are dead is called an orphan.
| A．who | B．who’s | C．whose | D．which |
Mr. Li is______ Chairman of the meeting.
| A．a | B．the | C．/ | D．an |
I was _____ tired _____ I thought I couldn’t cover the 70-mile hiking. But I made it finally.
| A．so; that | B．such; that | C．so; as to | D．such; as to |
People started to dig in this area, ______ caused much damage.
| A．that | B．which | C．whom | D．what |
After his father’s retirement, he ______ the whole business.
| A．took up | B．took over | C．took place | D．took down |