The problem is______ we can master modern science and technology in a short time

游客2024-10-26 6

问题 The problem is______ we can master modern science and technology in a short time.

选项 A、if
B、that
C、what
D、how

答案 D

解析

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Theproblemis______wecanmastermodernscienceandtechnologyinashorttime