—________does the tiger weigh？
—About 150 kilos．
| A．How many |
| B．What |
| C．How much |
| D．How |
Sam’s been doing his homework since 8: 00, ______ he?
A. isn’t B. doesn’t C. hasn’t
Most young people find ______ exciting to watch football games.
A. one B. that C. it
Though my grandpa is 60, he’s full of ______ energy and like a young man.
A. a B. 不填 C. an
I want to stop him ________ the window . It’s cold outside.
A. to close
B. from close
C. closing
Boys and girls, keep_____!We should always keep our classroom_____.
A.trying,cleaning
B. try,cleaned
C.trying,clean