根据汉语提示完成句子。（5分）
小题1:We take care of animals and plants. In fact we ________(保护) ourselves.
小题2:Please____ ____(查找) the words in the dictionary when you are in trouble.
小题3:Cows _______ __________(以…为食) grass.
小题4:Xu Xiao taught himself on the _______ (互联网).
小题5:I’m not sure (是否) he will come or not tomorrow.
