The word " them" in line 10 refers to_____
A.systems
B.telecommuters
C.executives
D.responsibilities

IX. Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.
I have narrowed it down to two computer games. I can't make up my mind.
A.Although I have narrowed it down to two computer games, I still can't make up my mind.
B.Having narrowed it down to two computer games, I can make up my mind.
C.I have narrowed it down to two computer games, which helps me make up my mind.
D.If I don't narrow it down to two computer games, I won't be able to make up my mind.

I think you'd rather________ to the mountains for your holiday.
A.to go
B.go
C.have gone
D.going

When I said I liked my mother's new hat, it was a _______. I didn't want to upset her.
A.good lie
B.kind lie
C.white lie
D.black lie

Since the appearance of karaoke recorders, they_____-
A.have widely used
B.were widely used
C.have been widely used
D.are widely used

The reason why telecommuting has not become popular is that the employees ___________ .
A.feel that a work area in their home is away from the office.
B.are worried about the promotion if they are not seen at the office.
C.are ignorant of telecommuting.
D.need regular interaction with their families.

(27)
A.another
B.every
C.other
D.whole

(29)
A.aims
B.causes
C.purposes
D.reasons

(30)
A.analysis
B.attempt
C.experiment
D.event

(32)
A.discovery
B.education
C.experiment
D.research