I don’t think _________ possible to master a foreign language without much memory work.
It’s a very kind offer, but I really _____ accept it.
That car nearly hit me; I ______.
“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
“I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”
I had to ______ because someone else wanted to use the phone.