— Is it my age ______the boss minds?
—I’m afraid so. He will consider ______ necessary to have an experienced assistant.?

It is exactly ______he often fails in the exam ______ makes his parents worried about him.

It is not until we know more about the situation ______ we are able to improve it.

It was between 1830 and 1835 ______ the modern newspaper was born.
A how          B that                 C which        D because

Could it be in the classroom_____ we had a talk last night _____you left your keys? 

— Who is making so much noise in the garden?
— ______ the children.

I believe it’s for the reason___ he had to drop out of school and left his hometown.

Actually, what you did ______ what you said made your parents disappointed.

It was at this shop _______ I bought my skirt. How about coming to my home to have a look tonight?

It was after he went to college __ he realized the importance of forming a reading habit.