(·陕西 13)Let those in need that we will go all out to help them.A. to understandB. und

问题补充：

(·陕西，13)Let those in need that we will go all out to help them.

A. to understand

B. understand

C. understanding

D. understood

答案：

A. to understand

(答案→)B. understand

C. understanding

D. understood

解析：考查非谓语动词。动词let后接动词原形understand做宾补，表示与宾语those in need之间为主动关系，构成短语let sb do sth。故选B。