I （）20 yuan buying this book yesterday.

单项选择题Even the best student in our class couldn't answer this question, so it （）be very difficult.

A．must
B．could
C．may
D．can

单项选择题You'll find this map of great （）in helping you to get round London.

A．price
B．cost
C．value
D．usefulness

单项选择题Please make my excuse at tomorrow's meeting. I've got too much work （）.

A．to do to come
B．doing coming
C．to do coming
D．doing to come

单项选择题Does （）matter if he can't finish the job on time

A．this
B．that
C．he
D．it

单项选择题The bride and groom promised to （）each other through sickness and health.

A．nourish
B．nominate
C．roster
D．cherish

单项选择题You cannot imagine how I feel （）with my duties sometimes.

A．overflowed
B．overthrown
C．overwhelmed
D．overturned

单项选择题Since our knowledge is （）none of us can exclude the possibility of being wrong.

A．controlled
B．restrained
C．finite
D．delicate

单项选择题It seems somewhat （）to expect anyone to drive 3 hours just for a 20-minute meeting.

A．eccentric
B．impossible
C．absurd
D．unique

单项选择题The computer revolution may well change society as （）as did the Industrial Revolution.

A．certainly
B．insignificantly
C．fundamentally
D．comparatively

单项选择题The old lady has developed a （）cough which cannot be cured completely in a short time.

A．perpetual
B．permanent
C．chronic
D．sustained