New words：

status ['steitəs] n. 地位；身份；状态；状况

Sample Sentences：

What is your income status, sir?
He has a very high social status.
Women are only asking to be given equal status with men.
Please allow a few minutes for the status of your account to be updated.

social ['səuʃəl] adj. 社会的；社会上的；社会地位的；社交的
update [ʌp'deit] v. 更新

New words：

upgrade ['ʌpgreid] v. 升级；提升；提高；改进；改善

Sample Sentences：

Your phone needs a software upgrade.
We need to upgrade the status of teachers.
Harvard College was upgraded to the university status.

status ['steitəs] n. 地位；身份；状态

New words：

graduate ['grædjueit]
n.毕业生；
v.毕业；授予学位

Sample Sentences：

Mary was graduated from Oxford.
It is three years since he graduated.
The college graduated 50 students last year.
Graduates from our school are working all over the island.

New words：

occur [əˈkɜː(r)] v. 发生；出现；存在于；出现在；被想到；想起

Sample Sentences：

A brilliant idea occurred to me.
Do giraffes occur in Africa only?
When did the earthquake occur/happen?
Food shortages often occur in time of war.
That plane crash occurred only minutes after take-off.

New words：

observe [əb'zə:v] v.观察；看到；庆祝；监视；遵守（规则、法律等）

Sample Sentences：

Didn't you observe the difference?
This law must be strictly observed.
I observed him entering the bank with a gun.
They carefully observed the behavior of deer.
Do you observe Christmas Day in your country?