21.—Where will you start your work after graduation?
—Mum,it’s not been decided yet. I might continue my study for higher degree.
A.the,the B./,a C./,the D.the,/
22.The visitors lost their way in the forest ; made things worse. was that it began to rain.
A.that B.which C.who D.what
23.If you 痰孟里)providedspit at all, please spit in the bucket(
A.must B.shall C.should D.may
