The teacher teaches us English.[ ]
A. learn
B. learning
C. learns
D. to learn
答案:D
In our class, Bill is the only one of the students who ________ from America.[ ]
A. come
B. comes
C. have come
D. are
属于可转移风险的招标采购风险是( )
A.索赔 B.安全生产风险C.采购项目变更 D.政策风险