(B)21.Miss Jones says Tom is ________ excellent student at school.
A.a B.an C.the D./
(A)22.I liked the piano very much,but it was too ________.So I didn't buy it.
A.expensive B.cheap C.beautiful D.different
(B)23.________,the policemen got there soon and saved the children.
A.Lovely B.Luckily C.Friendly D.Easily
(C)24.It's getting ________.Let's stop the work and go home for dinner.
A.warm B.dirty C.dark D.old