I.单项选择。（每小题1分。共20分）
1. ---- Could you lend me your dictionary?
I left ________at borne. ---- Certainly.
A. it B. yours C. one D. mine
2. My aunt will arrive in Guangzhou ______-- the morning of July 17th.
A. at B. on C. in D. till
3. _________ Mrs. Wilson came into the classroom, all the children welcome her.
A. Whether B. As well as C. If D. As soon as
4. Liz is kind to others and she has always found it easy to ________ at school.
A. make friend B. make friend with C. make friends D. make friends with
5. ---- How well did you do in the maths exam?
---- Better than before. I think it was______ difficult than the last one.
A. more B. less C. much D. very
