Life is like a play; it’s not the length, but the excellence of acting ________ matters.
| A．which | B．that | C．who | D．what |
Whenever I met her，__________ was fairly often, she greeted me with a sweet smile.
| A．who | B．which |
| C．when | D．that |
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 |