A signal word is a word that indicates a connection between ideas.
Answer:
the A/C is been repaired now
Answer:
used for saying that something happens many times. I read through her letter again and again
Explanation:
Well technology is far more advanced than what we had decades ago. so it takes a simple lab test to see what you affected by. And also we have had more time to study what each allergy does and what symptoms may be involved in it