His sister left home in 1998, and ______ since.
| A．had not been heard of | B．has not been heard of |
| C．had not heard of | D．has not heard of |
—I guess you can buy such a smart phone for 300 dollars.
—I could just two months ago，but the price ________ by 20%.
| A．went up | B．had gone up |
| C．has gone up | D．goes up |
The London 2012 Olympic Games marks the third time that London ________ the right to host the modern Olympics.
| A．had had | B．has |
| C．had | D．has had |
—Help me out in the kitchen and I ________ you to a fresh pot of coffee.
—Sounds good.
| A．will treat | B．treat |
| C．am treating | D．have treated |
Because the shop ________，all the Tshirts are sold at half price.
| A．has closed down | B．closed down |
| C．is closing down | D．had closed down |
Every day________a proverb aloud several times until you have it memorized.
| A．read | B．reading | C．to read | D．reads |