______ without friends ______ the most difficult challenge for Chuck while living on the island.
| A．How to survive, is | B．How does he survive, are |
| C．How does he survive, is | D．How to survive, are |
Anyone, whether he is an official or a bus driver, should be ___________ respected.
| A．especially |
| B．equally |
| C．naturally |
| D．normally |
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 |