We decided not to climb the mountains as it was raining ________

This is certainly the case, but ____ it is a mistake or not I don’t know.

I felt greatly honored ____ when I took partin my friend’s birthday party

I’m so glad to see you back, Lucy. How long _____ at your grandma’s?[ ]

Must I study medicine and become a doctor like you, dad—No, you _______, son. You’re free to make your own decision.