This 's a map and that's a ruler 这个句子肯定有问题,写了

This 's a map and that's a ruler 这个句子肯定有问题,写了 This's a map and that's a ruler.这句话哪里出错了? This's a map and that's a ruler这句子里哪个单词是错误的请指出并改正 This's a pen and that's a ruler. this’s a pen and that’s a ruler.哪里错了 That's a ruler.对 a ruler 提问.Is this an apple?改为复数句子. This's my ruler and that's his ruler哪里错了 This's my ruler and that's his ruler 有没有错 And this is a pencil,too.It's yellow.This is s ruler .It's b That's a map 一一一 用画线句子提问 Is that a ruler? Yes,it’s 哪里错了 What's this?This is a backpack这个句子有问题吗?