New Words：
saw [sɔ:] n. 锯
jigsaw ['dʒigsɔ:] n. 拼图；拼板玩具；线锯；竖锯；钢丝锯
blade [bleid] n.刀片；刀刃；桨叶；刀身
Sample Sentences：
A jigsaw is a type of saw with a thin blade.
I don't have the patience to do jigsaw puzzles.
The blades of the electric fan are covered with dust.
New Words：
insist [in'sist] v.坚持；坚决要求；坚决主张；固执己见
insist on/upon sth
insist on/upon doing sth
Sample Sentences：
He insisted that he had done right.
I didn't want to go but he insisted.
If you insist on leaving now, please go ahead.
We insist on the highest standards at all times.
New Words：
scatter [ˈskætər] v. 撒；四散；驱散；撒播
Sample Sentences：
The wind soon scattered the clouds.
When the tree falls, the monkeys scatter.
The birds scattered at the sound of the gun.
The ground was scattered with broken glass.
New Words：
quarrel ['kwɔrəl]
v.争吵；吵架；吵嘴
n.争吵；口角；拌嘴
Sample Sentences：
They had a quarrel about money.
I have no quarrel with what you say.
My sister and I used to quarrel all the time.
She quarrelled with her brother over their father's will.
New Words：
selfish ['selfiʃ] adj. 自私的
selfishness ['selfiʃnis] n. 自私
Sample Sentences：
You must learn to share and not be so selfish.
You'll have to pay for your selfishness some day.
It was selfish of him to leave all the work to you.