大中城市交通特点有哪些？
参考答案：
人多车杂，子巷密布，交通拥挤。交通管理组织与设施比较严密、完善，行人有遵守交通规则的常识和良好的习惯。
读问句，选择正确的答案。
1. — What letter is an insect (昆虫)? — It's ______________. [ ]
A. Ww
B. Bb
C. Pp
2. — What letter is a drink? — It's ______________.[ ]
A. Tt
B. Rr
C. Dd
3. — What letter is a question? — It's ______________.[ ]
A. Nn
B. Jj
C. Yy
4. — What letter is a kind of vegetable? — It's ______________.[ ]
A. Jj
B. Hh
5. — What letter is myself? — It's ______________.[ ]
A. Bb
B. Ii
C. Tt
In my opinion, he is the second ______ sportsman in the world.[ ]
A. great
B. greater
C. greatest
D. the greatest
