1 . 阿里巴巴不仅成为了世界上最大的在线销售公司，还改变了人们的购物习惯。（汉译英）

2 . Not until ________, ________ the camp site.

A．the sun went down; they reached	B．did the sun go down; they reached
C．the sun went down; did they reach	D．did the sun go down; did they reach

3 . 只有当所有人都各尽其力时我们才能保护我们现在居住的星球。(do one’s bit，倒装) （汉译英）

4 . 他不但提出了宝贵的建议，还给我们提供了实习机会。
Not only ________ ________ ________ ________ valuable suggestions, but also he organized internship opportunities for us.