They are busy ( ) a research ( ) environment A to,on B on,at
They are busy ( ) a research ( ) environment A to,on B on,at
They are excited______the party.A.at B.on C.after
Then they will have to bo on ( ) the busy woyk. A.to B.for c
They are __ a visit __ London A in ;of B on; to C of;to D at
They are putting a map__the front wall. A.in B.at C.on Dover
_____ the trees some birds are singing.A.On B.At C.In They a
选择填空They are working( )a project.A at B on C for
To protect the environment, we are on the way. Here are a fe
They go to school ___seven thirty A.on B.about at C.at about
……Then they will have to go on __ the busy work. A、with B、to
They are going on a study trip to London at next week.
They are ____ the school basketball team. A)on B)of C)at