apple trees 还是 apples trees?为什么会有travellers cheques and bankers drafts呢?

apple trees还是apples trees? 名词变复数 为什么apple tree变apple trees,Chinese还是Chinese apple Apple apple apple trees 还是 apples trees?为什么会有travellers cheques and bankers drafts呢? The policemen's wives sit under the apple trees 还是 The policemen's wives sit under the apple tree What are those?- ______.A.They are apple trees B.Those are apple trees为什么不选B而是选A,这是语法规定还是习惯用法? There are two farmers ( ) the apple trees They aren'r apple trees改单数 These are apple trees(改为单数句) Those are ——A apple trees B apples trees 苹果树翻译起来是apple trees.为什么不是apples trees? Are those_______big?A:apple trees B:apples treec:apples trees d:apple tree选哪个?理由? There are some apple trees behind the house(对画线部分提问)画线部分：some apple trees______ ______ behind the house?我就是搞不清是is还是are。 half an apple 还是a half apple还是都可以 an apple is red还是the apple is red帮 是Is she like apple?还是Does she like apple?