Guangzhou is one of _____cities in China．（ ）
A．the biggestB．big
C．bigger
By the end of Last year, we _____ more than 1,100,000 cars.
| A．were producing | B．produced |
| C．had produced | D．would produce |
— Did you borrow the comic book from the library?
— Yes. I ________ it for three days. I’ll return it this afternoon.
| A．borrowed | B．had kept |
| C．have borrowed | D．have kept |
—Tom, why did you make no reply to me when I called your name in the street just now?
—Sorry, Jim. I ________ to my wife on the phone.
| A．talked | B．was talking |
| C．am talking | D．had talked |
-Let’s ask Tom to play soccer now.
-Oh, no. He ______ English.
| A．was studying | B．studied |
| C．has studied | D．is studying |
By the time he was twelve, Edison __________ to make a living by himself.
| A．would begin | B．has begun |
| C．had begun | D．was begun |