11．A ship in harbor is safe，but that's not__________ships are built for.

　　12．Much time__________(spend)sitting at a desk，office workers are generally troubled by health problems.

　　答案

　　1．serves　2.unconsciously　3.from；to　4.on　5．threatening　6.how　7.in　8.away　9.up　10．with；making　11.what　12.spent

Ⅱ.用下列词组的恰当形式填空

　　give away，be involved in，communicate with，make a deal，think of，hold up，more than，vary from...to...，in the distance，on guard

　　1．The soldiers are still__________on National Day.

　　2．Please don't__________my secret__________！

　　3．It is hard to__________a world without metals.

　　4．The shy girl__________her hand to express that she had a question.

　　5．The climate always__________season__________season.

　　6．Not being able to__________the US students has become a serious problem for overseas Chinese students.

　　7．The sound of the car died away__________．

　　8．She__________a serious car accident last week.

　　9．Jason is__________a lecturer；he is a writer，too.

10．They__________to sell the land to a property developer.