—Why don't you ask your brother __________ help?
A:understand; with
B:follow; for
C:speak; for
D:pick up; by
①交谈时态度谦逊、语气友好
②自我介绍时要注意介绍的内容和时机等
③与人交谈要热情投入、固执己见
④礼物要精心选择、得体馈赠