Every year _______ foreign visitors come to Beijing to pay a visit to the places of interest.
| A．tens of thousands of | B．ten thousands of |
| C．ten thousands | D．thousands upon thousands |
. Scientists are making every _________ to find a new cure to cancer.
| A．effect | B．affect | C．effort | D．afford |
—How do you like working here?
—_______.To be honest，I miss my former colleagues．
| A．I like it here | B．Not so good | C．More than satisfactory | D．very much |
What’s the use of keeping the secret ______ everyone has already known it?
| A．as though | B．now that | C．before long | D．in case |
he party was______success．We sang and danced until it came to_______end at midnight．
| A．a；an | B．a；the | C．the；an | D．／；an |
There is a new problem involved in the popularity of private cars ___________ road
conditions need _____________.
| A．when; improving | B．which; to be improved | C．where; improving | D．that; to be improved |