New words：

stern [stə:n] adj. 严厉的；严峻的；苛刻的
sternly ['stə:nli] adv. 严厉地；严肃地

Sample Sentences：

Her mother looked sternly at the boy.
She had a stern father who never praised her.
Even one minute’s lateness would earn a stern rebuke.

lateness ['leitnis] n. 迟；晚
rebuke [ri'bju:k] n. 指责；责备；斥责；训斥

New words：

corridor ['kɔridɔ:r] n. 走廊；通道；过道

Sample Sentences：

The thief crept along the corridor.
My room is at the end of the corridor.
If you see litter in the corridor, pick it up

New words：

attend [ə'tend] v.参加；出席；到；上

Sample Sentences：

How many people attend church every Sunday?
Please let us know if you cannot attend the meeting.
Children must attend school between the ages of 5 and 16.

New words：

staircase [ˈsterˌkeɪs] n. 楼梯

Sample Sentences：

We must redecorate the staircase.
She was sitting on the bottom step of the staircase.
Old people must be very careful as they climb a staircase.
In case of fire, please follow the direction of arrow and take the nearest staircase.

New words：

opposed [ə'pəuzd]
adj.截然不同；强烈反对；反对的；敌对的；对立的
v.“oppose”的过去式和过去分词

opposed to sth 反对
as opposed to （表示对比）而，相对于；而不是

Sample Sentences：

He was strongly opposed to the idea.
His father opposed his plan to work abroad.
I am here on business as opposed to a holiday.
200 attended, as opposed to 300 the previous year.