The present on the desk _______more than 100 yuan.
| A．spent | B．took | C．cost | D．paid |
I ____ my clothes when my father got home.
| A．wash | B．washed |
| C．am washing | D．was washing |
We should protect the earth because it's home to ____ animals.
| A．million | B．millions |
| C．million of | D．millions of |
The police told the boys ____ in the street .It was dangerous.
| A．don’t to play | B．to not play |
| C．not to play | D．not play |
— What about going to the zoo by bus? — ____.
| A．A little | B．It doesn't matter |
| C．That's bad | D．Good idea |
It is difficult ____ me ____ English well. But I’ll study harder.
| A．to, learn | B．for, learning |
| C．for, to learn | D．to, to learn |