_____ that air conditioners cause so much pollution, I would never have bought one.
#83033
A
Had I known
B
I had known
C
Were I to know
D
Did I know
推荐题目
We must apply what we have learned to our daily work because in no case_____ from practice.
#81130
A
should theory separate
B
theory should be separated
C
theory should separate
D
should theory be separated
Beneath our feet_____ that our lives depend on for food and clothing.
#79901
A
lies the earth
B
lay the earth
C
the earth lies
D
does the earth lie
If _______, these injuries can develop into more serious problems.
#81448
A
left untreating
B
left untreated
C
leaving untreated
D
are left untreated
Once_____in the forest, you ought to remain__ you are waiting for help．
#82616
A
being lost; where
B
losing; where
C
lost; there
D
lost; where
his first assignment at the office of a popular English newspaper.
#82037
A
Never Zhou Yang will forget
B
Never will forget Zhou Yang
C
Never will Zhou Yang forget
D
Never forget Zhou Yang will