what is 的问句,一般都用 It's回答.如：---What is this\that?---It's an apple.复数用：---what are these\those?----They areapples.用there be回答的问句多为：----How many students are there in your class?...那what's in the gardon? 不是用there'are some……回答的吗？是的。--what's in the gardon?--There'san apple tree in it .简单回答： An apple tree （ in it ）.复数回答：There'resome apple trees in it .简单回答：some apple trees（ in it ）.