推 stan2:question1: "difficulty in communication"댠 140.114.114.12 11/28 16:30
→ stan2:這三個字要一起看 140.114.114.12 11/28 16:31
1. It is difficulty in communication that causes visitors to
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Africa the most trouble.
為什麼是difficulty，而不是difficult呢?
2. If only I had learn to ski then!
^^^^^^^^^
為什麼是had而非have呢?
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