There are two huge trees in front of the building.They are standing there for almost fifty years.这里面后半句为什么用现在进行时呢,而不是现在完成时呢?

there are two t.students ithere are two t. students in my school There are two funny pictures on the wall (t ). there are some 还是there are two There are two huge trees in front of the building.They are standing there for almost fifty years.这里面后半句为什么用现在进行时呢,而不是现在完成时呢? there are two libraries in our school,__?A、aren't there B、are there C、aren't they D、are they there are two bears o-- there The fatory is very big.There are two t() and five hundred workers in it I don't think so.There()anyChinese books in my bag,but there are two English books 英文翻译：There are same two.和 There are fifty. there are many huge trees standing on the top of the mountain有什么错误 there are two kinds of memory there are two chairs and a desk There are two farmers ( ) the apple trees There are two pictures ) the wall Are there d_ between the two pictures? There are four windows ( )the two doors. there are two maps on the back there are two p______ of good news.