23. Mr. Smiths was busy writing a story, only ______ once in a while to smoke a cigarette.
| A．to stop | B．to have stopped | C．being stopped | D．stopping |
_______ everyone here, I wish you a pleasant journey back to your country.
| A．By means of | B．On behalf of | C．In search of | D．For fear of |
I think you need some outdoor exercise. Plenty of fresh air will ________good health.
| A．contribute to | B．devote to | C．apply to | D．adjust to |
We will be free tomorrow，so I suggest ________to the history museum.
| A．to visit | B．visiting |
| C．we should visit | D．a visit |
Our journey was slow because the bus stopped at different villages________．
| A．normally | B．gradually |
| C．constantly | D．regularly |
I can't say which wine is best---it's a(n)_______of personal taste.
| A．affair | B．matter | C．event | D．variety |