With ………….. 5,000 tigers remaining in the world today, time is quickly running out for this beautiful animal. 
A.As fewer than
B. so few as
C.not fewer than
D.as few as

This year it was ……. that many of our flowering plants die. 
A.so a dry summer 
B.a so dry a summer
C.so dry a summer
D.such dry a summer

The contestant …………. the most questions correctly wins the prize. 
A.answering 
B.answered
C.which is answering
D.who answering

A useful way to ……. your vocabulary is to read as much as possible. 
A.amass
B.increase 
C.collect 
D.gather

 The whole purpose of all these exercises is to …….. your knowledge of grammar and vocabulary.
A. test 
B.probe
C. investigate 
D.interpret

Start reading the story from page 4 and then go on until you …… the end of the chapter. 
A.arrive 
B. reach 
C.touch
D. achieve

……. , the balcony chairs will be ruined in this weather. 
A.Leaving uncovered 
B.Left uncovered 
C. Having left uncovered 
D. Were left uncovered

 “You’re so lucky to be going abroad for a whole semester!” “ ……., I’ll miss my friends and family” 
A.That is
B.On account of that 
C.All the same
D.But despite

The boss was good enough to …….. my mistake. 
A.oversee 
B.overtake
C.overdo 
D.overlook

When the building was completed, all the workers were paid ……. 
A.off
B. through
C. out
D.over