7. (A). Alex did fine in calculus.

　　(B). Calculus was hard for Alex.

　　(C). Alex had trouble getting to math class.

　　(D). It used to be difficult for Alex to find us.

　　8. (A). Why is California so popular?

　　(B). California is my favorite state.

　　(C). Is California the state you mentioned?

　　(D). The state with the most people is California.

　　答案与音频文本：

　　BD

　　7. Alex used to find calculus difficult.

　　8. California, that is the most heavily populated state.