_______ Tom, we wouldn’t have been late for the last bus.
A．If we didn’t wait for B．If we haven’t waited for
C．we hadn’t waited for D．Had we not waited for
The twin brothers stand under the tree, ______ and say nothing.
A．puzzled B．puzzling C．being puzzling D．being puzzled
________ 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
