There is no doubt _______international cooperation is the key to dealing with cyber crime.
A．thenB．thatC． wheatherD．this
B

試題分析：考查固定句式。固定句式:There is no doubt that…毫無(wú)疑問(wèn)…that引導(dǎo)是一個(gè)同位語(yǔ)從句，介紹名詞的內(nèi)容。因?yàn)閚o doubt表示的是一個(gè)確定的陳述的事實(shí)，故使用that引導(dǎo)。Whether引導(dǎo)的是一個(gè)表示疑問(wèn)的句子。記憶：毫無(wú)疑問(wèn)國(guó)際合作是對(duì)付網(wǎng)絡(luò)犯罪的關(guān)鍵。故B正確。
點(diǎn)評(píng)：固定句式:There is no doubt that…毫無(wú)疑問(wèn)…that引導(dǎo)是一個(gè)同位語(yǔ)從句，介紹名詞的內(nèi)容。在同位語(yǔ)從句中要注意句子所表示的意思，是確定的事實(shí)就用that，如果表示疑問(wèn)就使用whether, when, how, why等。
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