# 第二部分 语法（六） > 贡献者：@芬 ## 真题解析 1. ____ my wallet when I was shopping in the store. A. must have dropped B. should have dropped C. could drop D. ought to have dropped > 答案：A 2. She ____ be ill because I saw her playing tennis just now. A. can’t B. couldn’t C. mustn’t D. may not > 答案：A 3. He abandoned a career that ____ to his becoming one of the most influential people in the world. A. could have led B. would lead C. should have led D. must lead > 答案：A 4. Sorry, officer. I ____ at 80 miles but I didn’t see any sign in the area telling people how fast they can drive. A. should not drive B. shouldn’t have driven C. mustn’t drive D. can’t drive > 答案：B