David Singer, my friend's father,______raised and educated in New York, lived and lectured
A. who
B. if
C. while
D. though
What kind of techniques has the author used by taking the example of "a pencil"？
A. Metaphor.
B. Simile.
C. Analogy.
D. Association.
The word that in the passage refers to
A. electricity
B. cost
C. energy
D. people
A．HoweverB．InsteadC．ThereforeD．Besides
A. However
B. Instead
C. Therefore
D. Besides
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