TNF的编码基因位于A．HLA-Ⅰ区B．HLA-B区C．HLA-Ⅱ区D．HLA-DR区E．HLA-Ⅲ区

What is considered rude？

It is considered rude to accept an invitation and then not to appear without __________ in advance.

What' s happening on the road this evening？

A．There' s a road construction on the Inner City Bypass.

B．There' s a car accident on Smith' s Road.

C．Many traffic lights are out of order on the Southern Highway.

D．Routes south is the best way to go without any delays.

Newspapers_______(information) their readerson what is happening in the world.

A、happens

B、happened

C、is happening

D、was happening

A、is happening

B、is happened

C、was happening

D、was happened

I wish I ______ what is happening there in his room.

A．know B．known C．knew D．should know

What happened in that class probably reflects what is happening in society ______.

A．at large

B．at random

C．at first

D．at length