Mostofthechildrenincoastalcitiesreceive

問題詳情：

     Most of the children in coastal cities receive ______ good education, _________ some in the western parts never go to school.

A. /; when                 B. a; when              C. /; while                  D. a; while

【回答】

D

知識點：連詞

題型：選擇題