语音：请选出每组中下划线字母发音不同的单词（共5小题；每小题1分，满分5分）。
The doctor could ______ by the symptom that the patient caught flu.
I can’t stand ________ with Jane in the same office. She just refuses _______ talking while she works.
I’m considering _______ a washing machine, which is considered ________ a great help to my wife.
By the time he was twelve, Edison ________ to make a living by himself .
Ladies and gentlemen, please fasten your seat belts. The plane __________.
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