New words：

favor [ˈfeɪvər]
favour [ˈfeɪvər]
v.偏爱；更喜欢、倾向于；有利于；赞成；
n.恩惠；帮助；偏爱；喜爱；好感；赞成

do someone a favor 帮某人一个忙
ask a favor of 向某人求助；请求某人帮忙
in favor of 支持；赞成；有利于

Sample Sentences：

Warm weather favors the growth of plants.
He favors taking the bus instead of driving.
Most students are in favor of longer lunch breaks.

Could you do me a favor and pass the salt?
She asked a favor of her brother to fix her bike.
Parents should avoid showing favor to one child over another.

New words：

withdraw [wɪðˈdrɔ] v.撤回；取款；撤离；

Sample Sentences：

She withdrew $200 from the bank.
He decided to withdraw her application.
The team withdrew from the competition.
The general ordered his men to withdraw in three hours.

New words：

wonder [ˈwʌndə(r)]
v.想知道；惊讶；惊叹；琢磨
n.奇迹；惊讶；惊奇；奇观

No wonder​​ 难怪
​​In wonder​​ 惊讶地

Sample Sentences：

I wonder who she is.
He looked at me in wonder.
She ​​wondered​​ if he would come to the party.

It’s a ​​wonder​​ he survived the accident!
"No ​​wonder​​ you’re tired—you worked all night!"
The Great Wall is one of the ​​wonders​​ of the world.

New words：

wander [ˈwɑndər]
n.徘徊；游荡；闲逛；溜达
v.漫游；游荡；闲逛；走神

Sample Sentences：

Try not to let your mind wander.
Jarvis found his attention wandering.
Her thoughts wandered back to her youth.
I went to the park and had a wander around.
When he got bored he wandered around the fair.
The child was found wandering the streets alone.

New words：

challenge [ˈtʃæləndʒ]
n.挑战；质疑
v.向(某人)挑战；考查；盘问；对…怀疑（或质疑）

Sample Sentences：

He raised a challenge to the decision.
This math problem is a ​​challenge​​ for most students.
The teacher gave us a ​​challenge​​ to read 10 books this month.

Tom ​​challenged​​ me to a race after school.
The police ​​challenged​​ his ID at the airport.
Their school challenged ours to a football match.
I don't have the courage to challenge my boss's decision