4．A secretary should_be_appointed to assist the president.

应该指派一位秘书来协助总统。

5．An active volcano may_erupt at any time.

活火山随时可能爆发。

6．You should equip_your_life_with a good education.

你应该用好的教育来装备你的一生。

7．Having had a good rest，they started_to_make_their_way up the mountain.

休息好了之后，他们开始爬山。

8．I was_amazed_at the extent of his knowledge.

我对他知识的渊博感到惊奇。

9．His holiday being_over，he returned to his home and prepared for work.

由于假期结束了，他回到了家并且为工作做好了准备。

10．The officer waved_the_soldiers_to advance.

军官指挥士兵前进。

Ⅲ.阅读理解

　　There are many places to go on safari(观赏野生动物)in Africa，but riding a horse through the flooded waters of Botswana's Okavango Delta must rank as one of the world's most exciting wildlife journeys.

Several safari camps operate as the base for this adventure，providing unique rides twice a day to explore deep into the delta.The camps have