The biosphere is a complete, encloaed envirnment because nothing enters it .........the sun's heat entering through the glass or plastic.
(A)exceptionally
(B)except for
(C)additionally
(D)in addition to
答案是(B)
我的問題是(B)(D)義意相似,都是除了...之外
而且都是介詞,怎麼區分?
麻煩知道的人可以告訴我嗎?
謝謝!
