John opened the door . There _____ he had never seen before.
| A．A girl did stand | B．a girl stood |
| C．did a girl stand | D．stood a girl |
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 |
If one succeed， one must put his heart into his career.
| A．will | B．is going to | C．is to | D．is about to |