New Words：
ensure [in'ʃur] v. 确保；保证；担保
mist [mist] n. 薄雾；水汽
Sample Sentences：
This medicine will ensure you a good night's sleep.
If you want to ensure that you catch the plane, take a taxi.
Everything was covered in mist.
She did not cry, but a mist came over her eyes.
New Words：
hiss[his]
n.嘘声, 嘶嘶声
v.发出嘘声（表示不满）, 发嘶嘶声
Sample Sentences：
The snake lifted its head and hissed.
A fire hisses if water is thrown on it.
The cat hissed as the dog came near it.
Hearing the hiss of gas, he rushed in and turned it off.
New Words：
cloak [kləuk]
n.斗蓬, 披风, 掩盖物
v.掩盖；遮盖
Sample Sentences：
The girl wore a red cloak.
They left the house under the cloak of darkness.
The hills were cloaked in thick mist.
He cloaked his evil purpose under friendly words.
mist [mist] n. 薄雾；水汽
New Words：
arrow ['ærəu] n. 箭
sword [sɔːrd] n. 剑；刀
Sample Sentences：
He shot an arrow at the dog.
He shot arrows one by one, but each missed.
The soldier cut at the enemy with his sword.
He came into the room with a sword in his hand.
New Words：
review [ri'vju:]
v.回顾；复习；审核；反思
n.回顾；述评；审查；评论
Sample Sentences：
The students are busy reviewing for a test.
The next day we reviewed the previous day's work.
Before falling asleep, she reviewed the day's happenings.