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）。
We know he comes from Canada, but that we don’t know much about him.
You’d better write the book in simple English the children aged 10-12 can read and understand it easily.
The game won’t continue if either of the teams doesn’t the rules.
—It is an hour before we can board the train. Shall we just wait here or go to have a cup of coffee?—________.
Helena was excited, as I had imagined, ________ her lost pet.
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