2022年年职称英语综合类完型填空练习(15)The whale is a mammalwarm-blooded, air-breathing, giving birth to its young alive1, sucking themand, like all mammals, originated on land. There are many signs of this. _D_1_ from flippers, used for steering and stability, are traces of feet.Immense strength is built into the great body of the big whales, and in fact most of a whales body is one gigantic muscle. The blue whales pulling _A_2_ has been estimated at 400 horsepower. One specimen was reported to have _C_3_ a whaling vessel for seven hours at the _B_4_ of eight knots.An enraged whale will attack a ship. A famous _C_5_ of this was the fate of whaler Essex, which was sunk _6_A_ South America early in the last century. More recently, steel ships have had their plates buckled2 in the same way. Sperm whales were known to _B_7_ the old-time whaleboats in their jaws and crush them.The greatest mystery of whales is their diving ability. The sperm whale can _8_C_ the bottom for his favourite food, the octopus. _A_9_ he is known to go as far down as 3,200 feet, where the pressure is 1,400 pounds, to the square inch. Doing _10_A_ he will remain submerged as long as one hour. Two feats are involved in this: storing up enough _B_11_ (all whales are air-breathed) and withstanding the great change in pressure. Just _C_12_ he does it scientists have not determined. It is believed that some of the oxygen is stored in a special system of blood vessels, rather than just held3 in the lungs. And _A_13_ that a special kind of oil in his head is some sort of compensating mechanism that automatically adjusts the internal pressure of his body. But_C_14_ you cant bring a live whale4 into the laboratory for study, no one _B_15_ just how these things work.1. A) Their B) His C) Theirs D) Its考试大论坛2. A) strength B) width C) height D) length3. A) eaten B) crashed C) towed D) lifted4. A) distance B) rate C) voyage D) sail5. A) picture B) film C) example D) book6. A) off the coast of B) of the coast of C) away the coast of D) in the coast of7. A) hit B) seize C) damage D) overturn8. A) sink to B) rest on C) dive to D) hide on9. A) In that search B) Because of this C) In spite of that D) In support of this10. A) so B) such C) above D) the same来源:考试大网11. A) air B) oxygen C) energy D) heat12. A) what B) where C) how D) when13. A) it is believed B) he believes C) we believe D) it believes14. A) because of B) due to C) since D) owing to15. A) communicates B) knows C) hears D) develops