单项选择：
1．The boy pretended he could read, but be was holding the book ______.
A．upside down B．inside out
C．upstairs D．downstairs
2．As we joined the big crowd, I got _____ from my friends.
A．separated B．spared
C．lost D．missed
3．It is estimated that 40 percent of the students in our class ______girls.
A．are B．is
C．am D．was
4．If they ______ the contract ahead of time, they could not have missed the plan.
A．signed B．had signed
C．would have signed D．should sign
5．There is a small lake _____ at the foot of the mountain, still and beautiful.
A．laying
B．lies
C．laid D．lying
6．While _____ in Australia, he met many of his old friends.
A．visiting B．visited
C．visit D．to visit
7．While in London, we paid a visit to the hospital founded ______ the nurse Florence Nightingale.
A．in line with B．in honor of
C．in favor of D．in place of
8．We hadn’t been out for long, _____ she felt sick.
A．as B．while
C．when D．after
9．If it were not for the fact that you ______ ill, I would ask you to do this right now.
A．were B．had been
C．are D．be
10．The apple is kept _____ a high shelf _____ the reach of children.
A．on, out of B．on, within
C．in, out of D．over, out of
11．I’m sorry that I took your hat ______.
A．by mistake B．with mistake
C．for mistake D．on purpose
12．—I’m afraid I can’t finish the book within this week.
—_______.
A．Please go ahead B．Hurry up
C．Not at all D．Take your time
13．A child ran ______ the street and knocked her ______ her bicycle.
A．onto, off B．into, off
C．in, of D．into, down
14．—I really don’t want to go to Tom’s party this evening.
—If I ______ you, I ______ to his party.
A．am, would go B．were, would go
C．was, would go D．am, will go
15．My sister met him at the Grand Theatre yesterday afternoon, so he ______ your lecture.
A．couldn’t have attended B．needn’t have attended
C．mustn’t have attended D．shouldn’t have attended
