The lecture was so complex that I simply couldn’t ______ at all. Could you explain it to me?
| A．bring on | B．bring in |
| C．take on | D．take in |
We are living in an agemany things are done on computer．
| A．which | B．that | C．whose | D．when |
Although knocked down by a car, he managed to ______ to his feet.
| A．stand | B．rise | C．run | D．struggle |
The sun heats the earth, ___________ is very important to living things.
| A．that | B．what | C．which | D．where |
I will visit you if Father ______ me.
| A．let | B．lets | C．is letting | D．will let |
The policeman warned the drive ________ so carelessly.
| A．never to drive | B．to never drive | C．to not drive | D．doesn’t drive |