We should tell hunters _______tigers.
| A．don’t kill | B．not kill | C．killing | D．not to kill |
One of my ____ is clean, but _____ one isn’t .
| A．foot ; other | B．feet ; the other |
| C．foot ; the other | D．feet ; other |
When he walks ____ my desk , he often knocks my books ____ the floor.
| A．pass ; onto | B．past ; on |
| C．pass ; on | D．past ; onto |
The teachers often make us _____ in class , and life here makes us _______.
| A．laugh ; happy | B．to laugh ; to happy |
| C．to laugh ; happy | D．laugh ; to be happy |
Light goes faster than sound.
| A．very | B．most | C．more | D．much |
Don’t __ to others like that. You should ___ politely.
| A．say; speak | B．speak; tell |
| C．say; talk | D．talk; speak |