26The birth rate has been falling sharply in our country _______ the past twenty years.
(A) after
(B) since
(C) for
(D) about
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統計: A(19), B(309), C(510), D(25), E(0) #1309850
統計: A(19), B(309), C(510), D(25), E(0) #1309850
詳解 (共 7 筆)
#3928504
for + 一段時間:for six years/ a week/ a month/ two hours
since + 某個時間點:since this morning/ 2 o'clock/ 1990/ yesterday
37
0
#5455309
since + 時間點
since twenty years ago
7
0