--________beautiful the day is! Let's go boating in the park. --Good idea! A. How B. What C. What a
---How long have you been running ? ---Since ______ .
He said he_____ to my home in a week.
Sally has been swimming ______ four hours.
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
I had a really hard time _____studying science this term.