Mary’s red face suggested that she_______shy, and her friends suggested that she______a deep breath.

A．be; should take

B．was, take

C．should be; took

D．was; takes

预防产生过失的方法主要有：（）

I.提前做好计划；

II.培养安全的做法与习惯；

III.检查和监督其他人；

IV.接受他人的检查和监督。

A.I+II+III

B.II+III+IV

C.I+II+IV

D.I+II+III+IV