Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.

She can play_______ piano, and she plays it ________.

I don’t remember how many years ago _____ I was taken to Beijing for the first time.

Don’t write_____ a pencil! Use a pen. [ ]

Linda, I called you this morning, but nobody answered the phone.—I’m sorry. I football with my friends then.