don't babies need glasses?
do you drop when you need it and take back when you don't?
's the difference between a monkey and a flea(跳蚤)?
is black when it is clean and white when it is dirty?
5-letter word has six left when you take 2 letters away?
is the center of gravity?
never asks questions but always gets answers?
Columbus discovered America,where did he stand?
is "four feet on four feet waiting for four feet?
the boy fell into the water,what's the first thing he did?
Keys (II)
use they like bottles better.
anchor.(锚)
13.A monkey can have fleas,but a flea can't have monkeys.
14.A blackboard.
y.
letter V.
17.A doorbell.
his feet.
19.A cat on a chair waiting for a mouse.
got wet first.
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