1.An elephant is twice as _____ as a horse.
问题描述：
1.An elephant is twice as _____ as a horse.
a.bigger b.biggest c.big d.more big
2.They do not all use it as their ____ tongue.
a.aunt b.mother c.father d.uncle
答
1.c as...as之间用形容词原形
2.b.mother tongue是固定搭配,母语的意思.