New words：

carpenter [ˈkɑrpəntər] n. 木匠；木工

Sample Sentences：

The carpenter glued two pieces of wood together.
The carpenter chipped, chopped, but the tree stood still.
A carpenter is a person whose job is making and repairing wooden things.

chip [tʃɪp] v.打破；弄缺；切下，削下，凿下(碎片、屑片)

chop [tʃɒp] v.砍；劈；切碎；剁碎

New words：

firm [fɜrm]
n.公司；企业；事务所；商行
adj.坚固的；稳固的；坚定的；坚决的

Sample Sentences：

The rope is firm enough to hold the heavy box.
His father works in a firm that sells computers.
He is one of the firmest supporters of this policy.
This firm was founded by two young men five years ago.

New words：

gamble [ˈɡæmbl] n.赌博；打赌；赌钱
gambling [ˈɡæmblɪŋ] n.赌博；打赌；赌钱

Sample Sentences：

My dad told me that gambling can ruin families.
Drive carefully and don't gamble with your life.
It's not safe to gamble on the train arriving late.
She knew she was taking a gamble but decided it was worth it.

New words：

vice [vaɪs]
n.恶习；恶行；老虎钳
adj. 副的；代理的

Sample Sentences：

Smoking is a bad vice that harms your health.
Gambling is considered a vice in many cultures.
The carpenter used a vice to hold the wood tightly.
When the president died, the vice president was chosen to head the firm.

gambling [ˈɡæmblɪŋ] n.赌博；打赌；赌钱

carpenter [ˈkɑrpəntər] n. 木匠；木工

firm [fɜrm] n. 公司；企业；事务所；商行

New words：

breakthrough [ˈbreɪkθruː] n. 重大进展，突破；

Sample Sentences：

A breakthrough is an important development or achievement.
Scientists are claiming a major breakthrough in the fight against cancer.