单选题Which of the following is an appropriate title for this passage?A Ready for a Round Trip to MarsB Ready for a Short Visit to MarsC Ready for a One-way Trip to MarsD Ready for a Walk on Mars

此句说明航天飞机能像火箭一样发射，像飞机一样着陆，这使它成为“独一无二的”，用unique“独特的”来形容最为适合。

Highlight the Spirit of Lei Feng Recently the spirit of Lei Feng in our country has become a heated topic, which has aroused the attention of all the people. Almost everyone speaks highly of this spirit and insists on carrying forward this spirit. As far as I am concerned, to highlight the spirit of Lei Fang one should do as follows.
First and foremost, everyone needs to participate in activities to highlight the spirit of Lei Feng. Only in this way can everyone be reminded of the importance of the spirit. Moreover, the spirit of Lei Feng should be appreciated from the heart, which could make people realize it's a pursuit of inner-consciousness, not a performance in March.
Last but not least, to highlight the spirit of Lei Feng we need the support of social environment. In a simple and friendly environment, people's behaviors will be more standardized accordingly.
In conclusion, it can not be achieved in one day to highlight the spirit of Lei Feng. Do from little things now and big things will grow, then we will truly embrace the spirit of Lei Feng.