问题
选择题
(2013·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
答案：B
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。