【題目】________ you know little about protecting yourself against the novel coronavirus (新冠病毒), you'd better search for more information about it online.

A.UnlessB.SinceC.ThoughD.Whether

【答案】B

【解析】

句意：既然你對(duì)保護(hù)自己避免感染新冠病毒不怎么了解，你最好在網(wǎng)上搜尋關(guān)于它的更多信息。

考查連詞。unless除非；since既然，因?yàn)椋?/span>though雖然；whether是否�！�you know little about protecting yourself against the novel coronavirus”表示原因，用since引導(dǎo)原因狀語(yǔ)從句。故選B。

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