It’s not right to ______ the poorer people of the world.
| A．look up | B．look down |
| C．look down on | D．look up to |
A lot of language learning，__________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
| A．as | B．it |
| C．which | D．this |
The whole town __________ by the flood after it has been raining for 3 days nonstop.
| A．was buried | B．had submerged |
| C．was submerged | D．flooded |
-Alvin, are you coming with us?
-I'd love to, but something unexpected __________.
| A．has come up | B．was coming up |
| C．had come up | D．would come up |
-May I open the window to let in some fresh air?
| A．Come on! | B．Take care! |
| C．Go ahead ！ | D．Hold on ！ |
Many of them turned a deaf ear to his advice，__________ they knew it to be valuable.
| A．as if | B．now that |
| C．even though | D．so that |