New words：

humor ['hju:mə] n.幽默
sense of humor 幽默感
humorous ['hju:mərəs] adj. 幽默的；好笑的；诙谐的

humorless ['hju:məlis] adj. 缺乏幽默感的；严肃的
inhumorous [in'hju:mərəs] adj. 不幽默的;不滑稽的

Sample Sentences：

Unlike his brother, he has a good sense of humor.
Humor is one of the greatest gifts our species has been given.

He had a wide mouth and humorous grey eyes.
He was quite humorous, and I liked that about him.

species ['spi:ʃi:z] n. 种；物种；种类

New words：

loose [lu:s]
adj.松的；宽松的；未固定牢的；可分开的
v.松开；释放；放任

Sample Sentences：

She is wearing a loose dress.
Some loose pages fell out of the book.
Never tell him a secret; he's got a loose tongue.
She helped the child loose the laces of his shoes.

New words：

ankle ['æŋkl] n.踝；踝关节

Sample Sentences：

She turned her ankle while ice-skating.
She stepped on a loose stone and twisted her ankle.
She broke her ankle weeks ago and it's still in plaster.

loose [lu:s] adj. 松的；宽松的；未固定牢的；可分开的

New words：

sparrow ['spærəu] n. 麻雀

Sample Sentences：

The boy has got a hen sparrow.
The sparrow is a common bird in our city.
I can see a sparrow flying in the distance.

New words：

twister ['twistər] n.旋风；龙卷风；难题
brain twister 脑筋急转弯；智力难题

Sample Sentences：

That's a real twister.
The girl is very good at the brain twister game.
The National Weather Service says at least 50 twisters were reported.
Pick three to five tongue twisters every day and practice them a few times.