____ I admit the problems are difficult, I don’t agree that they can’t be solved.
| A．Until | B．While | C．As | D．Unless |
Life is like a long race we compete with others to go beyond ourselves.
| A．why | B．what | C．that | D．where |
About 90 percent of the equipment presented by the administration， as well as the facilities of our own， made good use of in the teaching.
| A．have | B．has | C．have been | D．has been |
Never before in greater need of technical experts than it is today.
| A．has Hunan been | B．Hunan has been |
| C．was Hunan | D．Hunan was |
It is only people know the importance of science science can really serve the people.
| A．that； when | B．when； that | C．then； that | D．that； then |
Sor
ry， I didn’t hear you. I to the music.
| A．just listened | B．was just listening | C．has just listened | D．had just listened |