Some scientists have questioned the theory ______ CO2 is causing dangerous global warming.
| A．which | B．what | C．that | D．why |
—There is still a copy of the book in the library. Wall you go and bottow ?
—No, I’d rather buy in the bookstore.
| A．it; one | B．one; one | C．one; it | D．it; it |
_____________ worries me the way he keeps changing his mind.
| A．This | B．That | C．What | D．It |
___ felt funny watching myself on TV.
| A．One | B．This | C．It | D．That |
－I’ve read another book this week.
－Well, maybe _____ is not how much you read but what you read that counts.
| A． this | B．that | C．there | D．it |
I like this house with a beautiful garden in front, but I don’t have enough money to buy__________.
| A．one | B．it | C．this | D．that |