-- The scarf is nice, but the price is a little bit high.
--_______, but if you want high quality scarfs, you have to pay more.
| A．No wonder | B．No doubt |
| C．No offence | D．No problem |
-How amazing it is that astronauts are exploring outer space!
-It’s a challenge, I guess, ______ man against nature.
| A．of | B．for | C．by | D．about |
Why does the Lake smell terrible?
-Because large quantities of water .
| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
–Bruce, I really appreciate your handwriting.
- _______. .
| A．I practice every day | B．Thank you very much |
| C．No, I don’t think so | D．Well, it’s not good enough |
His efforts to raise money for his program were ______ because, no one showed any intention to take a cent out of their pockets.
| A．in place | B．in sight | C．in effect | D．in vain |
You’d sound a lot more polite if you make a request ______ a question. 
| A．in search of | B．in the form of |
C．in need of | D．in the direction of |