(28)
A.underestimate
B.lower
C.decrease
D.mislead

Many bridges in England were covered with wooden roofs to protect it from rain and snow.
A.rain and snow
B.Many
C.were covered
D.protect it

All nations may have to make fundamental changes in their economic, political, and the technological institutions if they are to preserve environment.
A.changes in
B.the technological institutions
C.have to make
D.to preserve

It was suggested that Pedro studies the material more thoroughly before attempting to pass the exam.
A.to pass
B.attempting
C.studies
D.more

(1)
A.approximately
B.properly
C.probably
D.possibly

(1)________
A.set up
B.took off
C.founded
D.began

(3)
A.examined
B.found
C.taken
D.looked

(7)
A.devoted
B.demolished
C.declared
D.decreased

(14)
A.Within
B.Beyond
C.Without
D.Above

She had only just put the phone down when her boss rang back.
A.Hardly did she put the phone down when her boss rang back.
B.Hardly she puts the phone down when her boss rang back.
C.Hardly had she put the phone down when her boss rang back.
D.Hardly she had put the phone down when her boss rang back.