Jack almost fell off the cliff, but managed to _____ until help came.
| A．keep on | B．catch on | C．count on | D．hang on |
Bicycling is good exercise ；___________, it does not pollute the air.
| A．nevertheless |
| B．besides |
| C．otherwise |
| D．therefore |
The island is ___________ attractive in spring and autumn because of the pleasant weather in both seasons.
| A．partly |
| B．merely |
| C．nearly |
| D．equally |
To be great, you must be smart, confident，and,___________, honest.
| A．therefore |
| B．above all |
| C．however |
| D．after all |
Never before ___________ seen anybody who can play tennis as well as Robert.
| A．had she |
| B．she had |
| C．has she |
| D．she has |
Jim went to answer the phone. ___________, Harry started to prepare lunch.
| A．However |
| B．Nevertheless |
| C．Besides |
| D．Meanwhile |