更多"It is because of ______ that dolphi"的相关试题:
[单项选择]Apes build nests in the trees but seldom sleep there for more than a night or two because _______.
A. they like to live in small family groups
B. they like to move from place to place in search of more food
C. they like to eat eggs, small animals, nuts and insects
D. it rains too often in the deep forests
[单项选择]Alcohol is seldom used as an antifreeze because___________.
A. it boils away easily
B. it is too expensive
C. it becomes hot easily
D. it freezes easily
[单项选择]My wife couldn't sleep last night because the tap in the bathroom was ______
A. draining
B. dropping
C. spilling
D. dripping
[单项选择]I couldn't sleep last night because the tap in the bathroom was ______.
A. draining
B. dropping
C. spilling
D. dripping
[单项选择]I didn't sleep well last night because it was too ______ outside.
A. noisy
B. quiet
C. noise
D. loud
[单项选择]I can't sleep at night because I drink too （）coffee during the day
A. many
B. much
C. lot
D. several
[单项选择]Compare with dreamless sleep, deep dream sleep is ______.
A. not the result of natural selection
B. less likely to appear to moneys
C. more protective to the animals
D. at a higher stage of evolution
[单项选择]Although dolphins sometimes swim singly or in pairs, they usually congregate in large herds, often numbering in the hundreds.
A. procreate
B. eat
C. live
D. assemble
[单项选择]In prehistoric times people seldom stayed anywhere for very long because their food supply usually ran out.
A. became depleted
B. was stolen
C. escaped
D. spoiled
[单项选择]Written records seldom tell social scientists all that they want to know about past cultures.
A. usually
B. frequently
C. hardly ever
D. never
[单项选择]Dolphins' brains are particularly well-developed to ______.
A. help them to travel fast in water
B. arrange sounds in different structures
C. respond to different kinds of sound
D. communicate with humans through sound
