(D) 1. Many kind-hearted people donated food and clothes_______ the people in the flooded areas.

A. in                   B. for               C. with         D. to

解析：本题考查donate的用法，donate sth to sb捐赠某物给某人，故答案选D.

(D) 2. Although it was really a difficult task, he decided to try his best to      success.

        A. challenge                      B. host                  C. approve             D. achieve

解析：词义辨析。Challenge vt. 挑战；host vt. 主持；approve vi. 赞同，同意；achieve vt. 取得。根据句意，选D.

(C) 3. The boss        company I worked in two years ago has      in solving such kind of

problem.

        A. whose, many experience                      B. who, many experience

        C. whose, much experience                       D. which, much experience

解析：本题考查定语从句关系词的选择和experience的正确运用。当experience作经验解释,是不可数名词，且定语从句中的关系词在从句中作定语，故答案选C.