ring off __________________________________________________
search for __________________________________________________
in case __________________________________________________
distinguish A from B_____________________________________________
set out (to do) __________________________________________________
dive into __________________________________________________
call up __________________________________________________
回复电话 __________________________________________________
次序颠倒，发生故障 ______________________________________________
设法联系上；通过；完成 __________________________________________
偶尔，有时 __________________________________________________
给……打电话 __________________________________________________
不挂断，稍等 __________________________________________________