.
It was _____ his mother came in _____ to prepare his lessons.

.Was it in 2000_________he was still in middle school_________this boy became an
expert at computer?

It ______ last night ______ Tom saw an interesting film in Dongfeng Cinema.

Was it because his mother was ill ______ he didn’t go to school?

_______ in the room where Mr. Johnson lived _______ the exhibition was held?

I just wonder               that makes him so excited.

Do you know ____ that made it possible for them to continue their project?

It was ______ the old worker came that we______ the experiment.

---- ______ he dropped out of school?
----His family had run into financial difficulties.
A. Why was it that   B. Why was that
C. Why was that it   C. Why was it

—___________ makes her different from the other students?
—Diligence, I think.