Question

【題目】Look at the sign "No swimming", it warns us ________ in the lake.

A.to swimB.not to swimC.swimming

Answer 1

【答案】B

【解析】

句意：看那個標志“禁止游泳”，它警告我們不要在湖里游泳。

考查動詞不定式的否定。to swim動詞不定式；not to swim動詞不定式的否定；swimming動名詞。表示“警告某人不要做某事”用warn sb. not to do；否定詞not放在動詞不定式的前面，此處用warn us not to swim。故選B。