P: People report increasing time in Computer report no change in viewing TV.
C: People increasing amount of free time on computer can maintain current tv viewing level
People increasing time in computer = People increasing amount free time on computer?
A. the numbers错误, twice后面要跟单数的number,即twice the number;但是改为the number后,指代特定的数字还是用that number更为明确
B. Correct; that number指代前面总和的469000,如果是the number,没有指代对象,似乎说是the number of trucks
such as作举例时,可以分开用,比如I have such reference books as dictionaries and handbooks