6、hisis________elephantatthezoo.(a/an/some)19.(2分)选择正确的词填空。evening too father he this(1)Heismyfriend________.(2)________ismyfather.(3)ThisisTom.________ismybrother.(4)MrLinismy________.(5)Good________,Tom.20.(2分)选出下列问句对应的答语。A.BecauseIlikesummervacatio