3、use I'm happyB. Because It's too hot.C. Because he is playing footballD. Because I'm playing hide-and seekE. Because my apples are falling down the stairs二、给下列各句选择相应答语。()Whyishetired(疲惫的)?()Whyareyoucrying?()Whyareyoulaughing?()Whyareyouhere?()Whyare