ee, I’m poor in physics and you arenot good at chemistry, and……— That’s _______ we should help each other

I have been staying up until midnight since Monday, working on my paperI need to ______ some sleep this weekend

There are many beautiful hats here. I really don’t know_______.

Would you mind if I take the seat next to you— _________. The person who was here has finished his lunch and left.

ill you deal with these papers, Ann—I will leave them to takesover the job.