— 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
消化和吸收是在____中完成的．
下列属于无脊椎动物的是（ ）
受战乱、环境变化等因素的影响，商朝多次迁都，到商王____时迁到殷，此后保持了相对的稳定；周平王迁都____，史称东周。
