单项选择题

The Americans declared their independence in _____ on July 4th, 1776.

A．Washington D.C.
B．New York
C．Philadelphia
D．Boston
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单项选择题
In analyzing a problem we should do all the following except_____.
A．recognize and define the problem
B．look for information to make the problem clearer
C．have suggestions for a possible solution
D．find a solution by trial or mistake
单项选择题
By referring to Sam' s broken bicycle, the author intends to_____.
A．illustrate the ways to repair his bicycle
B．discuss the problems of his bicycle
C．tell us how to solve a problem
D．show us how to analyses a problem
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