题目内容
When you ride a motorbike, you must ________ a helmet.
[ ]
|
A .put on |
B .to put on |
C .wear |
D .to wear |
答案:C
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题目内容
When you ride a motorbike, you must ________ a helmet.
[ ]
|
A .put on |
B .to put on |
C .wear |
D .to wear |