OG20老题目

Will_Jeanette

782) To estimate the expansion rate of the umverse is
a notoriously difficult problem because there is al
lack of a single yardstick that all distances can be
measured by.
(A) To estimate the expansion rate of the universe is
a notoriously dificult problem because there is
a lack of a single yardstick that all distances can
be measured by.
(B) Estimating the expansion rate of the universe is
a notoriously difficult problem because there is
no single yardstick by which all distances can be
measured.
(C) Because there is a lack of a single yardstick
to measure all distances by, estimating the
expansion rate of the universe is a notoriously
dificult problem.
(D) A notoriously dificult problem is to estimate the
expansion rate of the universe because a single
yardstick is lacking by which all distances can be
measured. .
(E) It is a notoriously difcult problem to estimate
the expansion rate of the universe because by no
single yardstick can all distances be measured.
老题目了，我这一次再来做这道题的感觉是problem不能用to do……来描述（感觉to do这个不能拿来当作一个问题来研究，只能表行为或者目的那种感觉），但是ving（estimating blablabla）可以作为一个problem，不知道这样考虑是否正确？我是从自己对句意的感觉来判断的，求助nn们，请问能不能这样去理解？

长丝弓

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