A.worked
B.was working
C.had been working
D.has been working

A.about
B.out
C.forth
D.up

A.supportive
B.interruptive
C.discouraging
D.confusing

A.spiritually
B.manually
C.automatically
D.mechanically

A.spiritually
B.manually
C.automatically
D.mechanically

A.help
B.debit
C.bill
D.debt

A.blue sleeping polyester bag
B.polyester sleeping blue bag
C.blue polyester sleeping bag
D.sleeping blue polyester bag

A.because
B.because of
C.though
D.in spite of

A.42
B.45
C.36
D.54

A.46 dB.
B.44 dB.
C.54 dB.
D.50 dB.