.
--- What can I do for?
--- I’d like to buy a gift for my sister’s birthday, one at a proper price but of _____ great use and it’d better be ______ surprise.
| A．/; a | B．the; a | C．a; / | D．/; the |
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 |
The fact has worried many scientists the earth is becoming warmer and warmer these years.
| A．what | B．which | C．th at |
D．though |