Many people have donated that type of blood; however the blood bank needs .A. someB. less

问题补充：

Many people have donated that type of blood; however, the blood bank needs .

A. some

B. less

C. much

D. more

答案：

A. some

B. less

C. much

(答案→)D. more

解析：考察代词。however之后的内容应与前面many产生呼应，有且只有D符合句意。句意：许多人捐献了那一血型的血；但是，血库需要更多（那样的血）。