—Be careful not to drop the Ming Dynasty vase.
—Yes, we can’t be ________.
| A．too careful | B．very careful | C．too careless | D．careless enough |
Social networking is an important factor________ business success.
| A．devoting to | B．appealing to | C．attaching to | D．leading to |
They are shocked to find that in this town the traffic rules are not strictly ________.
| A．noticed | B．recommended | C．observed | D．concerned |
How can you expect him to make any progress ____ you never give him a chance to have a try?
| A．when | B．unless | C．even though | D．until |
---Is there any flight to New York?
--- I think there ______ be, for it is snowing so heavily.
| A．shouldn’t | B．mustn’t | C．can’t | D．needn’t |
---I have some good news for you. You’ve been accepted as a member of our club. ---_____________ That’s great!
| A．Good idea! | B．Pardon? | C．Congratulations! | D．Have I? |