The reason ______he didn't come was ____

I'11 go hiking with Bruce if it         tomorrow.

A．doesn't rain

B．didn't rain

C．won't rain

D．hasn't rained

简述发展与过程？

收到以外币投人的资本时，实收资本账户采用的折算汇率是( )。

A．收到外币资本时的市场汇率

B．投资合同约定汇率

C．签订投资时的市场汇率

D．第一次收到外币资本时的折算汇率

A new big oilfield is reported______in the west of the country.

A．to have been found

B．to be found
C．found



D．having been found

原发性肺结核（）

A.多见于年老者

B.绝大多数可自然痊愈

C.大多数死于全身粟粒性结核病

D.绝大多数是消化道感染

E.大多数患者有较强的免疫力