用动词的适当形式填空
小题1:____________(study) Zhalong helps us learn about protecting wildlife.
小题2:Some of the students___________（remove）the snow when we arrived there.
小题3:One of my classmates __________________ ( be) to the Great Wall twice.
小题4:Father’s Day is coming, but I__________ (buy) a present for my father yet.
小题5:Tom ____________ (live) in Nanjing for ten months in 2005.
小题6:There__________ (be) many great changes in many areas in China since 2000.
小题7:The teacher has told us many times that light _____________ (travel) faster than sound.
小题8:We did everything we can____________ (protect) animals in danger.
