Question

9．We      cross the street when the red light is on．Obcy the traffic rules，children．（　�。�

• A． can
• B． mustn't
• C． may
• D． shouldn't

Answer 1

分析 紅燈亮?xí)r，我們不能橫穿馬路，遵守交通規(guī)則，孩子們．

解答 答案：B．
can，能，會(huì)；mustn't不可以；may可以；shouldn't不應(yīng)該．根據(jù)when the red light is on，可知根據(jù)生活實(shí)際，紅燈亮?xí)r，我們不能橫穿馬路，所以這里用mustn't來表示禁止．故選B．

點(diǎn)評(píng) 本題考查了情態(tài)動(dòng)詞的用法．熟知句意以及所給選項(xiàng)的意思是解答本題的關(guān)鍵．