As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.
| A．exposure | B．distribution | C．expansion | D．emission |
Sorry, I am too busy now. If I ____ time, I would certainly go for an outing with you.
| A．have had | B．had had | C．have | D．had |
（2012江西卷）We have bought so much food now that Suzie won’t be with us for dinner.
| A．may not | B．needn’t | C．can’t | D．mustn’t |
（2013·安徽卷)I to my cousin’s birthday party last night, but I was not available
| A．went | B．had gone |
| C．would go | D．would have gone |
（2013·安徽卷)It be the vocabulary that caused you the problem in the exercise because you know a lot of words.
| A．may | B．couldn’t | C．should | D．needn’t |
— What are you doing this Saturday?
— I’m not sure, but I go to the Rolling Stones concert
| A．must |
| B．would |
| C．should |
| D．might |