1 . Look at the trees on both sides of the streets. They________ last spring.

A．planted

B．were planted

C．were planting

2 . Children under 12 years are free to visit the museum and must be a ________ by an adult.（根据首字母单词拼写）

3 . Smoking is officially b________ in some public places, like theaters, libraries and restaurants. (根据首字母单词拼写)

4 . Whenchuan, the county which was completely d_________and then completely rebuilt, has become a symbol of the Chinese spirit of never giving up. (根据首字母提示单词拼写)