1. Although we feel dissatisfied with the election results, we have to become reconciled _____ the decision made by our fellow countrymen.
A．for
B．on
C．to
D．in

2. Just as the value of a telephone network increases with each new phone _____ to the system, so does the value of a computer system increase with each program that turns out.
A．adding
B．to have added
C．to add
D．added

3. The vocabulary and grammatical differences between British and American English are so trivial and few as hardly _____.
A．noticed
B．to be noticed
C．being noticed
D．to notice

4. If _____ from damage, solar cells can work well and operate for a long time.
A．protecting
B．being protected
C．having been protected
D．protected

5. Regardless of our advice, he invested all his money he had earned instock market; therefore we consider him _____ foolish.
A．to have been
B．being
C．be
D．having been

1.C 2.D 3.B4.D5.A