Question

It is our duty ______much attention to ________ our best to keep our city clean.

A．to pay, trying	B．paying, trying
C．pay, try	D．to pay, try

Answer 1

A

解析試題分析：句意: 注重盡我們最大努力保持我們的城市清潔是我們的責(zé)任。pay attention to是固定詞組，注意……。try one’s best to do 盡力做，是固定詞組。不定式to pay much attention to try our best to keep our city clean是句子的真正主語(yǔ)，代詞it是形式主語(yǔ)。據(jù)句意，故選A。
考點(diǎn)：考查動(dòng)詞短語(yǔ)和非謂語(yǔ)動(dòng)詞。