10. Heart trouble is one of the most ser_爱下问搜题

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问题选择题

10. Heart trouble is one of the most serious _____ of death among old people.

A．reasons

B．troubles

C．illnesses

D．Causes

答案

答案：D

选择题

---- Someone might see us.

-----___________? We are not doing anything illegal.

A．What’s up

B．What if

C．How come

D．So what

问答题

简述决策的程序。