( )Be quiet!The teachers_________an important meeting.

( )Be quiet!The teachers_________an important meeting.
A.will have B.are going to have C.are having D.have had
原因是什么?
( )Look,there is a little wind today.Let's_______our model plans together.
A.be fly B.fly C.are flying D.will fly
原因?
( )The police_______the thief after three days.
A.find B.find out C.found D.found out
原因?这里的after three days
after three days 是什么时态？要选哪个选项？