Perce Blackborow and his companions stayed on Elephant Island for six months before rescue came, so they ________ a lot of difficulties.
A. must go through B. may go through
C. must have gone through D. could have gone through
Written in a hurry, __________________ .
A. they found many mistakes in the report B. he made lots of mistakes in the report
C. there are a lot of mistakes in the report D. the report is full of mistakes
Is it the country ________ you studied ________ you are going to visit next week?
A. in which; which B. where; that C. that; that D. where; where
Why do you always drive to work _______ you could easily take the bus?
A. because B. though C. once D. when
Most people are in favor of the _______ against smoking in public places.
A. collision B. negotiation C. prohibition D. discrimination
Perseverance is a kind of quality, and that’s ______ it takes to do anything well.
A. what B. that C. when D. why
