The importance of saving gas_______be stressed too much. Automobiles use up some 70 billion gallons of gas a year.
| A．can’t | B．mustn’t | C．shouldn’t | D．may not |
I ______have come here in time, but I met an old friend of mine. I stopped and talked with him for some time.
| A．shouldn’t | B．must | C．needn’t | D．could |
______with Greek mythology made Monica ______to go to Greece for an adventure herself.
| A．Being obsessed; determining | B．Being obsessed; determined |
| C．Obsessing; determining | D．Obsessed; determined |
He looked at those jewels one after another ______and seemed to show no interest in any one of them.
| A．casually | B．greedily | C．confidentially | D．attentively |
I will treasure the encounter with the famous director who may ______my life.
| A．remark | B．accelerate | C．transform | D．contribute |
I always leave things about my son up to himself ______his decision is wrong, for I think he can learn more from failure.
| A．in case | B．even if | C．unless | D．until |