人才工作“三个留人”是指（）。
A.事业留人
B.环境留人
C.感情留人
D.适当待遇留人
参考答案：A, C, D
Her cousin ______ swim when he _____ six years old.
[ ]
A. can, is
B. could, were
C. could, was
D. can, was
慈善组织开展慈善活动，确需变更捐赠财产用途的，不必征得捐赠人同意。
