1.-Which month has 28 days.-Each month.我想问的是Every month 行不行,

1.
-Which month has 28 days.
-Each month.我想问的是Every month 行不行,如果不行的话请说明理由
和它们的区别..
2.
( )Which sport are you____today?
A.in B.on C.at D.to
3.
( )All the students ___an active part_____the sports meeting.
A.get ,on B.have ,in C.carry ,to D.take ,in
4.
他每天看电视不超过一小时．
He ______TV______more _____one hour every day.
5.
( )He found____dificult to speak out.
A.that B.it C.if D.when
(这题应该选A吧..那麽为什麽不选B.)
6.
There are two students sitting there.
There are two students are sitting there.
请问哪句对.如果是第一句的话,那么第二句为什么不对呢.