It is requested that the reporter ________ to blame for the wrong report.

A．referring to　　 　 B．referring to as

C．referred to be　　 D．referred to being

_________, one needs much practice.

　 A. To learn swimming well　　　　　 B. To learn to swim well

　 C. Swimming to be learned well　　　　 D. Learning swim well

To the d ______ of his parents，he has made a full recovery.

The missing boy were last seen _____ near the river.

A. playing　　　 B. to be playing C. play　　　　　 D. was playing

There is a man _______ himself Mr Li waiting for you.

A. called　　 B. calls　　 C. calling　　 D. call

他们看上去这样苍老，那是因为他们曾经辛辛苦苦地劳动了十年。

I finally reached my d________ tow hours later.

If______ it is heated to a high temperature, water will change into vapour

　 A.is heated B.heating C.heated D.to be heated

_____never gives up will succeed.

A. Whoever　 B. Who　　　 C. No matter who　 D. Whom

The __________(理论) he stuck to for many years turned out to be incorrect.