. I could hardly tell the twins apart because their appearances are only ____ different.
| A.slightly | B.gradually | C.personally | D.extremely | 
(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 | 
— It rained cats and dogs this morning. I’m glad we took an umbrella.
 — Yeah, we would have got wet all over if we _______.
| A.hadn’t | 
| B.haven’t | 
| C.didn’t | 
| D.don’t |