— Is your father free these days?
—No. He has mountains of work to do. He gets up early and comes back late every day.
A：lots of
B：some
C：a little
基因是具有遗传效应的DNA片段．（判断对错）
把下列词语补充完整，再读一读。
不____所措 ____相开放 清____无比 一____如洗
