—Is the boy in white clothes your friend, Kangkang?
—No. ____ in black clothes is.
| A．One | B．This | C．That | D．The one |
Sandra was a student ____ the age of 21.
| A．at | B．in | C．on | D．for |
Scientists say they are beginning to _____ in the fight against cancer.
| A．break in | B．break out | C．break down | D．break through |
As the spring comes, the flowers began to _____.
| A．come out | B．come in | C．come on | D．come down |
As we all know(众所周知), the dinosaur has _____.
| A．died | B．died out | C．died from | D．died of |
The kids are looking forward to ______ Spring Festival.
| A．celebrate | B．to celebrate | C．celebrating | D．being celebrated |