A:Why;because
B:That;that
C:Because;that
D:That; because
羊圈____(juàn quān) 半晌____(shǎng xiǎng) 教诲____(huǐ huì)
更____改(gèng gēng) 琴弦____(xuán xián) 角____度(jué jiǎo)
14×300=____
31×400=____
80×600=____