（1）Cindy， don't run in the living room!	A． Wood and glass．
（2）Alice， is your brother heavy or thin？	B． I agree with you．
（3）I think a true friend touches your heart．　_____	C． I'm sorry to hear that．
（4）Nick， what's your model plane made of？	D． Yes， he is very patient．
（5）My grandfather was hit by a bike yesterday．	E． Sorry， I won't do it again．
	F． Oh， he is of medium build．