Schools are good places for students to get __________and make friends．（ ）
| A． |
background |
B． |
knowledge |
| C． |
attention |
D． |
competition |
Schools are good places for students to get __________and make friends．（ ）
| A． |
background |
B． |
knowledge |
| C． |
attention |
D． |
competition |
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