[单项选择]After the cameraman had taken two photographs of the ants, he found they had ___________ all over his feet.


A. flocked
B. swarmed
C. gathered
D. crowded

[单项选择]After the cameraman had taken two photographs of the ants, he found they had ___________ all over his feet.
A. flocked
B. swarmed
C. gathered
D. crowded

[单项选择]After the cameraman had taken three or four photographs of the soldier ants, he found they had ______ all over his feet.
A. gathered
B. flocked
C. crowded
D. swarmed

[单项选择]She had two daughters, became doctors.
A. all the them
B. all of who
C. both of whom
D. all of whom

[单项选择]After he had finished the blueprint of the project, he____________ it to the committee for approval.
A. admitted
B. submitted
C. to be treated
D. must be treated

[单项选择]Every human being who has ever lived had two parents. Therefore, more people were alive three thousand years ago than are alive now.
The reasoning in the argument is flawed because it
A. overlooks the number of people in each generation during the last three thousand years who left no descendants.
B. disregards possible effects of disasters such as famines and plagues on human history.
C. overestimates the mathematical effect of repeated doublings on population size.
D. fails to take into account that people now alive have overlapping sets of ancestors.
E. (E) fails to consider that accurate estimation of the number of people alive three thousand years ago might be impossible.