II

91.unsuitable

92.unpredictable

93.fooled

94.similarly

95.forewarned

96.valuable

97.inadvisable

98.indispensable

99.waterproof

100.fitness

II. Speaking

Advantages:  hard, inexpensive, corrosion resistance

Disadvantages: fragile, can easily crack when being dropped, some products are more harmful to your health, 

E.Rewrite

101. You should not have allowed a 4-year-old child to walk home alone

102. Not until I left home could I realize how important the family is

103.Mrs. Green is proud of what her son has contributed to the play

104. Hardly any young engineers were recruited

105. We have booked five rooms, only two of which have air conditioning

106.  It looks as if she will come to the performance late

107. Had it not been for my Mom's help, I could not have held a big party

108. The harder you work, the more successful you will get

109. Such was her disappointment that Fiona could not keep on working.

110. Competent in his work as Richard is, he does not know how to deal with this client.