A few birds are
flying ___ the sky. ()
A: in
B: on
                    flying ___ the sky. ()
A: in
B: on
举一反三
- We can see ______ hundreds of birds flying in _____ sky.
 - Some birds are flying very high in ______ sky.冠词
 - We can see ______ hundreds of birds flying in _____ sky. A: a, a, B: / , a C: / , the D: the, the
 - High in the sky a _____ of birds was flying southward.( ) A: crowd B: swarm C: flock D: pack
 - High in the sky a ____ of birds was flying southward. A: swarm B: flock C: crowd D: herd
 
