问题补充:
To improve the quality of our products, we ask has used them for suggestions.
A. anyone
B. who
C. no matter who
D. whoever
答案:
A. anyone
B. who
C. no matter who
(答案→)D. whoever
解析:考查名词性从句。句中whoever引导宾语从句,在从句中作主语,故选D。
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