---You aren’t looking well. Anything the matter?
---I’ve been surfing the net too long. I’m a bit tired.I can hold on,____.
| A．though | B．yet | C．besides | D．therefore |
This is ______ that dog.
| A．as a big dog as | B．as big a dog as |
| C．a as big dog as | D．a big as dog as |
He worked hard and achieved what he set out to do, but ________ what he had owned, including his health and his marriage.
| A．at the mercy of | B．at the risk of |
| C．at the cost of | D．at the service of |
It saves time in the kitchen to have things you use a lot________easy reach.
| A．near | B．upon | C．within | D．around |
—It’s difficult to tell this picture from that one.
—Yes.The differences between the pictures are very________.
| A．broad | B．narrow | C．slight | D．impressive |
-Mary, would you like to come to my birthday party? -_____.
| A．Of course, you could | B．Sure. Go ahead |
| C．Sorry, you may not | D．No, you mustn’t |