<u>Answer:</u>
Stop [!] the train is approaching.
<u>Explanation:</u>
The punctuation should be an exclamation point because it used at the end of a sentence or a short phrase which expresses very strong feeling.
<em>Hoped this helped.</em>

Answer:
Yes it can.
Explanation:
I know cause I’ve experienced it
Answer:
D. compound-complex sentence
Explanation: