通读下面短文，掌握其大意，然后从短文后面的括号内选出可以填入短文空格的词，并将所选词的

字母代号填入相应的空格线上。

A. long    B. so    C. help    D. in    E. like    F. is    G. biggest    H. than    I. How    J. but

     What is the biggest animal of all? The whale (鲸) 1______. The blue whales are the 2______ whales.

Some blue whales weigh more 3______ a hundred tons (吨). 4______ heavy that is!Just think of a bus.

A bus is big and heavy, 5______ it weighs only about fifteen tons. A bus is about eight metres 6______,

but some blue whales are as long as thirty metres! Though (虽然)whales are 7______ big, they are a gentle

kind of giant (巨物). They live together and 8______ each other. Now we know whales "talk" to each other 

9______ the water. And the giants "speak" 10______ singing birds.

在杰普逊机场图的标题中若标有指定的CTAF，则表示该机场：（）.

A.无塔台管制

B.塔台是部分时间工作

C.A.B都对

D.A.B都不对