单选题I think _____ knowledge of the Internet is _____ must in our work today.Aa; aB/; theCthe; /D/; a
单选题
I think _____ knowledge of the Internet is _____ must in our work today.
A
a; a
B
/; the
C
the; /
D
/; a
参考解析
解析：
knowledge为不可数名词，而且是泛指，前面不加冠词；must意为“必做之事”，前面需要不定冠词。
knowledge为不可数名词，而且是泛指，前面不加冠词；must意为“必做之事”，前面需要不定冠词。
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