[填空题]

Why people can’t use all of the fresh water Because some of it is _________________________.

[填空题]Why people can’t use all of the fresh water
Because some of it is（）.

[填空题]Why can you use technical terminology in the abstract
Because your readers are usually ______ your scientific discipline.

[填空题]Why can water put out a fire

[单项选择]How much of the earth’s water can man really use
A. He can use nearly 75% of it.
B. He can use about 97% of it.
C. He can use exactly 3% of it.
D. He can use less than 3% of it.

[单项选择]
You can’t choose the name you are given at birth, but in many countries you can change it legally when you reach adulthood. Of course, most people never change their names (51) they feel unhappy about them. However, some people do (52) this course of action—particularly artists! What makes an artist want to change their name Sometimes it’s for purely (53) reasons, such as the Nobel Prize winning poet from Chile, Neflali Reyes. He didn’t want his father to (54) he was writing poetry, so he changed his name to Pablo Neruda when he was a young man. (55) other times the reason may appear eccentric; take the case of the Portuguese poet Femando Pessoa, (56) wrote under 75 different names. The reason is "When I use a different name, I always write in a different way," he explained. In most cases, (57) ,the reason is for social, historical, political, or cultural reasons.
A. private
B. individual
C. own
D. personal