You can’t imagine how beautiful the mountain is _____you see it with your own eyes.
A. until B. after C. while D. when
She has finished typing but she doesn’t know _______ next.
A. what to do B. how to do
C. what should she do D. how she should do
The kind teacher devoted all her time she had ___________ 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， youplay 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
