It is true that knowledge_____ rather than being taught.
| A．learns | B．learned | C．is learned | D．was learned |
I think there will be _____ people and ______pollution.
| A．less, fewer | B．less, more |
| C．fewer, less | D．fewer, fewer |
She plays ______ today．
| A．the football | B．the tennis |
| C．the guitar | D．piano |
He seems________.
| A．happily | B．happy |
| C．happiness | D．to happy |
It may take _________ years to make such robots ．
| A．hundred of | B．two hundreds |
| C．hundreds of | D．hundred |
There will be less ________．
| A．trees | B．people |
| C．pollution | D．cars |