Experts believe people can waste less food by shopping only when it is necessary.
| A．why | B．where | C．that | D．what |
________ Anirban Maitra, a professor at Oxford University, Jack’s success would not have been possible.
| A．If it weren’t for | B．Were it not for |
| C．Had it not been for | D．If it hasn’t been for |
Lee was faced with the of whether or not to return to his country after he got the doctor's degree in America
| A．situation | B．dilemma |
| C．environm ent | D．circumstance |
We left the small town, ______ clearly_____ no need to stay.
| A．there； being | B．it; was |
| C．it; being; | D．there；was |
There are frequently reports of accidents as fireworks ______, stored or transported.
| A．have been made | B．are being made |
| C．were made | D．have made |
Plastic bottles can be recycled but they need cleaning thoroughly, _______ they?
| A．needn't | B． don't | C．mustn't | D．can't |