Not until I went through his paper _________ what rapid progress he had made in writing.

A．I did find

B．did I find

C．I had found

D．was I found

气虚的常见临床表现是（）

A.闷、胀、痛

B.神疲乏力

C.脏器下垂

D.突然晕厥

E.面色苍白、汗出不止