---Is there any _______ to the time about how long I can stay here?
---Yes, you must leave here before he comes back.
A．number B．length C．limit D．matter
When she came several days later, she found that all things still _______ where she had _______ them.
A．lay; laid B．laid; lied C．lay; lain D．lying; lain
The day he had been looking forward to _______ at last.
A．come B．coming C．came D．has come
He ___________ unwisely, but he was at least trying to do something helpful.
A．may have acted B．must have acted
C．should have acted D．would act
Having checked the doors were closed and ______ all the lights were off, the boy opened the door to his bedroom.
A．why B．that C．when D．where
______ is often the case is that Tom doesn’t study hard and fails in passing an exam.
A．That B．What C．It D．As
