We were greatly shocked to hear the news that ______ two Chinese engineers were shot to death in Pakistan. Worse still, ______ third one died in a hospital afterwards.
| A．the; a | B．the; the | C．/; a | D．/; the |
By 16:30，__________ was almost closing time, nearly all the paintings had been sold.
| A．which | B．when |
| C．what | D．that |
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 ！ |