摘要：第一节:单项填空(共15小题.每小题1分.满分15分) 从A.B.C.D四个选项中.选出可以填入空白处的最佳选项.21．DNA is a nucleic acid that contains genetic instructions used in development and functioning of all known living organisms and some viruses. A．/; a B．the; the C．the; / D．/; /
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第一节：单项填空(共15小题；每小题1分，满分15分)
Of all the subjects, I like ______ physics best because it gives us ______ useful knowledge of things in science. And I long to turn ______ scientist in the future.
A. the ; a ; a B. / ; an ; / C./ ; a ; / D. the ; / ; /
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第一节：单项填空(共15小题；每小题1分，满分15分)
Of all the subjects, I like ______ physics best because it gives us ______ useful knowledge of things in science. And I long to turn ______ scientist in the future.
| A．the ; a ; a | B．/ ; an ; / | C．/ ; a ; / | D．the ; / ; / |
第一节：单项填空（共15小题；每小题1分，满分15分）
The government has promised to the matter and will give the workers a satisfactory answer.
A. look into B. look through C. put into D. put away
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