The more you smile, the _____ you will feel.
| A．happy | B．happily | C．happier | D．more happily |
The kind teacher devoted all her time ___________ her students.
| A．help | B．to help | C．helping | D．to helping |
— It’s dangerous to walk across the street carelessly.
— You’re right. We can’t be careful while crossing the street.
| A．so | B．very | C．too | D．more |
It’s quite clever ________ you _______ out the problem.
| A．for； working | B．for； to work |
| C．of； working | D．of； to work |
---Tom， you play football in the street. ---Sorry， I do it again.
| A．needn’t； won’t | B．mustn’t； won’t |
| C．can’t； will | D．won’t； can’t |
Not only Mr. and Mrs. Green but also their daughter ________ to China twice.
| A．have gone | B．have been | C．has gone | D．has been |