“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”

He wrote a letter ______ he explains what had happenedin the accident

．— Frequent lack of breakfast does harm to health.— ________, why do you always do that

Do you know Miss Tang—Yeah, she is an excellent teacher, ______she is famous ______a wonderful singer in our school.

Winter is my favorite. It’s a beautiful season, ______ when it snows.