what （are） those people doing thay are talking with with each other 为什么要用are 不用dowhat （are） those people doing thay are talking with each other .

what are those?（做否定回答） 问What are those?回答（ ）pencils? What are those?答语 what什么are those What colour are those What are those?________(those)are books. over what those are there what are those?改为单数 What are those?They are___________. What are those in English? What are those?____are___apple_ trees What are those?改成单数 what are those?(回答问句) What are those on the those,are,what,gloves,color(连词成句） What are those in English?（改为单数句） what are those t （ ）in the bed what are those they are ________.