It was a real () when Susan came back from her vacation and told us she had married a local waiter.

单项选择题Every member of society has to make a()to straggle for the freedom of the country.

A.pledge
B.warranty
C.resolve
D.guarantee

单项选择题Many people proposed that a national committee be formed to discuss () to existing mass transit systems.

A. substitutes
B. measures
C. duplicates
D. alternatives