SAT ie 一题(had it not been )for two particularly skillful mem

SAT IE改错题
1 In the back of the textbook A(are) a list of words that can be B(easily learned) by those C(who want to improve) D(their command of English).
2 A(When) recipes for iced tea B(appeared in) C(a few) late-nineteenth-century cookbooks,the drink did not D(becoming popular) until the 1903 World's Fair.
3 Someone who uses a personal computer A（to perform) only B(such tasks as) word processing and sendng e-mail C(need not) buy the D(most advanced) model available on the market.E(no error)
4 Quincy took Dan to Derek's home A(for a visit),B(never imagining) that five years C(would pass) before D(seeing) Derek again.

一道SAT ie 真题Despite research on the diagnosis of heart disease
1、Despite research on the diagnosis of heart disease and the use of increasingly sophisticated technology ,the condition od coronary arterists is still difficult to assess precisely.E
但是我认为“its”指代不清,大牛们别和我说就近原则啊 我看着后面的更近!

SAT IE题两道.
The new system,which (uses) remote cameras (in the catching of) (spending motorists),(may undermine) the police department's authority.
Although the politican was (initially) very sensitive to (be criticized) by the press,he (quickly became) more confident about (responding to) reporters' sometimes pointed questions.

请教一道SAT IE题 与时态有关.
At a time 【when】 interest in twentieth-century classical music 【seems】 on the verge 【to disappear】,the avantgarde compositions of the 1960s and 1970s 【manage】 to retain their popularity.【No error】 我已经知道错因,可是我还想问,为什麽这个发生在过去的事件还能用一般现在时表述?像"seems" 还有 "manage"...是因为表述事实的原因吗?虚心求教!