–Why do you like the parrot__________? --Because it has ________ feathers.
| A．well, color | B．better, colorful |
| C．best, colorful | D．best, color |
If prices rise too high, the government has to do something _________ it.
| A．stop | B．stopped | C．stopping | D．to stop |
We hope you can accept our ___________and join us.
| A．invite | B．to invite |
| C．invitation | D．inviting |
—How long may I keep the book? —You ________ keep it for two weeks.
| A．may | B．must | C．will | D．have to |
Please tell Tom ______ too much noise.
| A．to make | B．not to make |
| C．to not make | D．not make |