Waht（ am/is/are）

Waht（ am/is/are） Waht（ am/is/are）this 选哪个 Waht is（缩写） tom,waht is the matter with you?i am all [ ] Waht letters are PUMPKIN IS WAHT waht shape is it? waht is gdp What we need are good doctors.为什么谓语是are而不是is,主语是waht啊 am is are 过去式 是am is are am is are. 用am,is,are am、is、are、 用am,is,are is am are they know waht each other are doingthey each know waht other is doing；they know what each is doingthey know waht they each are doing、这四句哪句是对的.解释说明错在那里 flow rate waht is this