乙型肝炎病毒常发生A．隐性感染 B．急性（病原消灭型)感染 C．慢性感染 D．潜伏感染 E．慢发病毒感染

The policeman cautioned the prisoners _____ any tricks.

A: not playing

B: not to play

C: not to playing

D: not play

The missing boys were last seen () near the river.

A、to play

B、play

C、to be playing

D、playing

Mary doesn’t feel like() tennis today because she feels tired.

A played

B play

C to play

D playing

We don't keep winning games ______ we keep playing well.

A．because B．unless C．when D．while

We don't keep winning games ______ we keep playing well.

A．because B．unless C．when D．while

So excited and joyful ______that we were soon completely lost in playing and laughing.

A．we felt

B．felt we

C．did we feel

D．had we felt

So excited and joyful ______ that we were soon completely lost in playing and laughing.

A．we felt

B．felt we

C．did we feel

D．had we felt

听力原文：What do you do？

(5)

A．I am playing basketball.

B．I often go swimming.

C．I am a teacher.

D．Yes, I do.

If the weather is fine，We shall go Oil playing basketball________．

A.altogether

B.all together

C.all

D.all-together