________ that I was puzzled.
A．So difficult a question did he ask me
B．Such difficult a question did he ask me
C．Such a difficult question he asked me
D．He asked me a so difficult question
The factory, including its machines and buildings, ______ burnt to ashes during the fire.
A．is B．are C．was D．were
– Are you cleaning my room?
– I can’t help _____．I can’t bear seeing people’s room in a mess!
A．it B．this C．anything D．so
He thought that painting copied by a modern artist was ______ great value and bought it ____ over a thousand dollars.
A．at; for B．of; for C．of; at D．for; by
Let him who tied the bell onto the tiger take it off -- _____ started the trouble should end it.
A．whomever B．who C．whoever D．anyone
Social networking is an important factor _______ business success.
A．devoting to B．appealing to C．attaching to D．leading to
