课后练习:
1.“We’ve all gone a little ____ about the outer space business,” says Vice Admiral C.B. Momsen.
A craze B crazy C crazed D crazing
2.The ocean is the place where we should be putting our efforts in order to ____ future generations.
A provide for B provide with C provided that D provide
3.Seventy-one percent of the earth’s surface is covered ____ water.
A by B for C in D at
4.An observer, ____ the earth from another planet, would be likely to call it Oceanus.
A look at B looked at C looking at D is look at
5.One main branch of sea science, physical oceanography, _____ enormous unanswered questions.
A hold B to hold C holds D holding
6.We know that several depressions in the floor are ____ than Mt. Everest is high, but we can’t be sure that we have found the ______ one.
A deep, deep B deepest, deeper C deeper, deep D deeper, deepest
7.The world’s deepest land shaft accessible to men is the Champion Reef gold mine in India, _____ is only 9,811 feet deep.
A that B which C who D what
8.____ will take him years of the most painstaking instrument building, campaigns at sea, and every conceivable cross-check to establish the doubt.
A It B This C That D What
答案:1B 2A 3A 4C 5C 6D 7B 8A
补充练习:
1. Only if these negative results are valid formulate the question: how do they live.
A he will be able toB will he be able to
2. He instantly identified it as a coelacanth, a species for 60 million years.
A believed extinct B to believe extinctC has believed extinctD believe extinct
3. Serious scientists do not the possibility that there are sea monsters to be discovered.
A rule overB rule offC rule onD rule out
4. Consider the abyssal valley the Marianas Trench, west of Guam.
A calling; lyingB called; lyingC called; lain