" I am terribly sorry !" " _______"
A.Nothing
B.Never mind !
C.Don't worry
D.It's nothing

The party, _____________ I was the guest of honor, was extremely enjoyable.
A.to which
B.by which
C.for which
D.at which

If they are not careful with their accounts, their business will go _______.
A.poor
B.broken
C.bankrupt
D.penniless

" Could I speak to Susie May, please ?" " Yes,_______."
A.Talking
B.Answering
C.Speaking
D.Saying

A.knowledge
B.accident
C.miserable
D.reaction

A.overwhelming
B.optimistic
C.intellectual
D.incredible

A.address
B.control
C.generous
D.pagoda

A.pleasure
B.optimistic
C.guaranty
D.sanguine

According to the passage, what kind of signal has long periods of light that are regularly broken by two or more periods of darkness?
A.Flashing
B.occulting
C.Group occulting
D.Group flashing

Which of the following is NOT mentioned in the passage as one of the functions of lighthouses?
A.To notify sailors that bad weather is approaching
B.To indicate that land is near
C.To warn of danger from rocks and reefs
D.To help sailors determine their location