Our class __________ forty-five students, in other words, forty-five students __________ our class.
_____there be a flood this summer, what would we do?
I have some difficulty in finding his house. I wish I_____his address.
How I wish that you could attend the party, even though you _____busy.
---Sorry. I must be off. ---How nice it would be if you_____a bit longer!
I hate interruptions, _____when I ’m concentrating on my study.