Directions:BeneatheachofthefollowingsentencestherearefourchoicesmarkedA,
B,CandD.Choosetheoneanswerthatbestcompletesthesentence.
Example:
Thewildflowerslookedlikeasoftorangeblanketthedesert.
A.coveringB.coveredC.coverD.tocover
TheanswerisA.
21.Listen!Doyouhearsomeoneforhelp?
A.calling
B.call
C.tocall
D.called
正确答案:A


