Let's surprise Mom (with) a present.为什么要用with

Let's surprise Mom (with) a present.为什么要用with let's help him with Chinese 为什么要用with 这里为什么用with,不用use?顺便给翻译下Let's buy a big house (with )the mone let's fly with take a present with you It's a room with things lost and found.为什么要用with pleasant surprise from a pleasant with have a surprise party,为什么要用surprise? let's draw with markers. let's( )with each other. Let"s send our teacher a present. Tom,Let,s play__that ball.A.with B./ C.and