John is very. －if he promises to do something he'll do it.
| A． | independent | B． | confident | C． | reliable | D． | flexible |
Man _____ die without air or water.
| A．will | B．shall | C．should | D．would |
He was a good swimmer, so he _____ swim across the river.
| A．might | B．could | C．would | D．was able to |
You _____ go there with us if you don’t want to.
| A．mustn’t | B．needn’t | C．can’t | D．may not |
The boy looks pale and thin. He _____ ill.
| A．can be | B．has to be | C．must be | D．should be |
.He went there on foot and got very tired, but he _____ by bus. The fare was rather cheap.
| A．could have gone | B．must have gone |
| C．ought have gone | D．will have gone |