The first sentence is an interrogatory question, so a question mark is used. The second sentence is a declarative sentence and will use a period. The third sentence is an exclamatory sentence, and should use an exclamation mark at the end.
Mandarin, Arabic, Japanese - I would say languages with more complicated characters are harder..
Answer:
seems correct to me.
Explanation:
"It is bad that nature's sources are polluted because it is bad for the environment and animals."
Answer:
The answer is: est poeta.
Explanation: