(A)naturereserves(A)uslearnmoreaboutprotectinganimals.
A.studing,helpsB.studies,tohelpC.study,helpingD.studying,help
为什么选A,reserve明明加了S的.
(D)thebusdrove(D)thediectionofthecentreofthetown.
A.toB.forC.towardsD.in
这题完全不懂.