—________ English book is this?
—Maybe it is Lucy's.
| A．Who | B．Who | C．When | D．Whose |
Yesterday something ________ happened. We didn't know what it was.
| A．unhappy | B．uneasy | C．unable | D．unusual |
This coat ________ be Tom's. He doesn't like the color at all.
| A．must | B．might | C．could | D．can't |
—Is Mr. Smith over there?
—It ________ be him. He has gone to Beijing on business.
| A．can't | B．must | C．might | D．can |
-was the car invented?
--It was invented in 1983.
| A．When | B．Why | C．How | D．Who |