She was staring out over the lake，_____ in thought.
| A．lost | B．losing | C．to lose | D．to having lost |
By the time you arrive in London, we ______ in Europe for two weeks.
| A．shall stay | B．have stayed | C．will have stayed | D．have been staying |
- Sorry, Joe, I didn't mean to …
- Don't call me "Joe". I'm Mr Parker to you, and _____ you forget it !
| A． | do | B． | didn't | C． | did | D． | don't |
My mind wasn’t on what he was saying, so I’m afraid I _____ half of it.
| A．was missing | B．had missed | C．will miss | D．missed |
Let’s keep to the point or we ______ any decisions.
| A．will never reach | B．have never reached | C．never reach | D．never reached |
I ______ while reading the English textbook. Luckily, my roommate woke me up in time !
| A．had fallen asleep | B．have fallen asleep | C．fell asleep | D．fall asleep |