问题
选择题
Schools in the north tend to be better equipped, ______ those in the south are relatively poor.
A.as
B.unless
C.when
D.while
答案
答案:D
题目分析:考查连词。A因为;B除非;C当……时候;D然而。句意:北方的学校趋向于更好的装备,而那些南方的学校相对差点。故D正确。