选出与其它三个单词划线部分发音不同的单词。（每小题1分，共5分）
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Don’t / weist / your time doing that thing.
| A．west | B．wait | C．waste | D．waiting |
My best friend often tells me some jokes to make me ________/ la:f /.
| A．large | B．cough | C．life | D．laugh |
I usually go to school by ________/ baIk / on weekdays.
| A．book | B．bike | C．back | D．bank |
– You’ve donated so much money. Thanks a lot.
– ______.
A. It’s my pleasure
B. Take it easy
C. That sounds great
– Excuse me, Mr. Lee. Could I take a photo with you?
– Sure. ______!
A. Go away B. Go ahead C. Look out