4. look
v. 常用短语：look up, look through, look on,look into, look down upon, look back, lookout, look forward to和look up to sb.
look up 向上看,查阅（小的内容）
If you don’t know how to pronounce a word, you can look it up in a dictionary.如果这个单词你不知道怎么发音,你可以查字典。
look through 快速检查某事物。快速阅读某物。如：
He looked through his notes before the exam.考试前他匆匆看了一下笔记。
look on 观看某事物；旁观。如：
Many people only looked on, doing nothing for the injured man.对那个受伤的人,许多人只是袖手旁观。
look into 朝里看,调查。如:
The whole matter is being looked into.整个事情正在进一步地调查之中。
look down upon/on鄙视或看不起某人。如：
At that time, women were looked down upon.在那时,妇女被人瞧不起。
look back on 回顾。如：
At the sight of the old cap, he couldn’t help looking back upon his bitter days.一看见那顶旧帽,他情不自禁地回想起那些艰苦的日子。
look out 小心,当心。如：
Look out for the coming car!当心驶来的汽车。
look forward to (欣然)期待某事物。如：
He is looking forward to seeing his old friends.他盼望着见到他的老朋友。
look up to sb. 赞赏或尊敬某人。
As a student, he should look up to his teachers.作为学生,他应该尊敬老师。

5. progress
n. 前进，进步，进展。如：
They made slow progress toward the destination on the muddy road.他们在泥泞的路上向目的地缓慢前进。
You have made great progress in speaking English. 你的英语口语有了很大的进步。
in progress 进行中
The game is still in progress.比赛还在进行中。

6. puzzle
vt. 使迷惑, 使为难
What puzzled me most was that he hadn’t shown up all the day.
No maths problem can puzzle him.
puzzled/puzzling
I was very puzzled at the puzzling news.
n. 难题 谜；困惑；迷惑
The students are doing a word puzzle.
The police are in a puzzle about the case.

7. lately 近来, 最近 同义词：recently
lately多用于否定和疑问句。
I haven't seen him lately.
Have you been there lately?
注意：be late for school (adj)
get up late (adv)