A.
<span>past participle is the answer hope i helped</span>
Doing research helps in collaboration discussion,because it makes the participants understand one another well without the need of Any argument.
Second one, makes the most sense to me personally
When you have that special person. It makes you feel any type of emotion. You try your best to love that person but sometimes you fail them. And you regret that. But you always keep going and going because you know that you will always love that person and also because you don’t want to lose that person at all.