【单选题】
____ it is you found, you must give it back to the person it belongs to.
【单选题】
If you don’t think it necessary to make ____ any missed lessons, speak up now.
【单选题】
No sooner had he sat down to lunch ____ there was a knock at the door.
【单选题】
When the teacher had ____through with the class, they felt very ashamed.
【单选题】
“Which of these two ties will you take?” “I’ll take ____to give me a change sometimes.”?
【单选题】
No one, except his two best friends ____his joy or sorrow in his life.
【单选题】
He would like to view difficulties ____ a kind of challenge.
【单选题】
As a result of the unfavorable working conditions, the project has to be put off____.
【单选题】
1.—Did you accept his invitation? — ____bet I did.
【单选题】
Thisbookisdesignedforlearners ____ nativelanguagesarenotChinese.