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【单选题】
What are the possible roles of a teacher?

Controller, assessor
Organizer, prompter
Participant, resource-provider
All of the above.
【判断题】
The young teacher are dancing there.

正确
错误
【单选题】
设集合L = {1, 2, 3, 6},对于整除关系能够构成:

仅偏序集不是格;
仅格不是分配格;
仅分配格不是布尔代数;
布尔代数。
【单选题】
If by any chance someone comes to see me, ask the person to leave a ____.

message
letter
sentence
notice
【判断题】
A: Could I ask you a favor? B: Good idea.

正确
错误
【单选题】
It is getting dark. Our teacher __ .

let us to go home
let us go home
let us go to home
let we go home
【单选题】
The teacher asked her ____ at home.

t o stay
stay
stayed
staying
【单选题】
The teacher came [填空] the classroom.

into
on
for
in
【单选题】
Mr Green _______a good teacher.

has always been
has been always
always has been
【多选题】
设集合L = {1, 2, 3, 6, 12},对于整除关系不能构成:

仅偏序集不是格;
仅格不是分配格;
仅分配格不是布尔代数;
布尔代数。