16.The old couple invited many guests to a grand dinner to ___ their silver wedding anniversary.
A) welcome
B) congratulate
C) exclaim
D) celebrate

17.They travelled to Spain by the most ___ route.
A) easy
B) direct
C) straight
D) unique

18.What he said just now had little to do with the question ___ discussion.
A) on
B) in
C) under
D) at

19.He said that very clearly so that nobody was in any ___ about what was meant.
A) doubt
B) wonder
C) question
D) consideration

20.The headmaster had been trying for years to ___ money for a new science block.
A) arise
B) raise
C) lift
D) arouse