题文
I like these books because they offer me a lot of__ knowledge．（ ）
| A． |
useful |
B． |
awful |
C． |
useless |
D． |
boring |
I like these books because they offer me a lot of__ knowledge．（ ）
| A． |
useful |
B． |
awful |
C． |
useless |
D． |
boring |
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