國文屋

位置:首頁 > 練習題 > 

______scientistshavedonealotofresearchonA(H1N1)flu,ther...

練習題1.92W

問題詳情:

______scientistshavedonealotofresearchonA(H1N1)flu,ther...

______ scientists have done a lot of research on A (H1N1) flu, there are still some cases for further study.

A. As   B. Once   C. If     D. Although

【回答】

D

知識點:連詞

題型:選擇題

標籤: