(   ) 1. Nanjing attracts     tourists every year.     the tourists during the May Day holiday is about two million.

       A. the number of; A number of          B. a number of; The number of

       C. a lot of; A number of               D. the number of; Lots of

(   ) 2. –Excuse me. Can I smoke here?    --_____________.

       A. you mustn’t    B. No, please   C. You’d better not   D. I’m sorry, you can

(   )3 Before she came to our school, she ______ for five years.

       A. had studied English             B. have studied English

       C. was studying English            D. will study

(   )4. Ought you _______ hands before you eat snacks?

       A. to wash     B. wash      C. washing      D. not wash