什么是front to back L/C

什么是front to back L/C －－I can't open the front door.----Why not try ___the back door?A.open B.to open C.opening答案为什么是C? 外贸中,背对背信用证是怎么回事?（back to back L/C) Please ( ) the boy from back to front .A.give B.pass C.catch D.fly Please ( ) the coin from back to front.A.give B.pass C.catch D.fly l'll return the pen ( )you soon A:back to B:back form C to Dform She is short,so she sits ____ the classroom.A.next to B.in the front of C.in front of D.at the back She is short,so she sits the classroom.A.next to B.in front of C.in the front of D.at the back of Does he often get to school___you?a.before b.behind c.in front of d.at the back of from back-end odds collection to front-end publication 1 I want you _____ me 2 I'm short ,so I sit _______ the classroom1A .to help B.help C.to a D.helps2A.in front of B.in the front of C.at the back of D.behind i can't open the front door.Why not try ___the back door?A open B to open C opening D to opening I like to sit ___ my parents when we take photos.A.between B.in the middle of C.in the front of D.at the back some boys aiso like to wear a cap.they turn the c ap so the front is at the back.急 This is a key ____ the front door.Why you try it at the back door?A.to B.in C.of D.with When you cross the street,you must look to _____.A.the left first B.the right first C.the front first D.the back first he___from a back seat to a front seat so that he could see more.A.turned B.swithed C.removed D.tra Don't talk to the bus driver while he is driving______the bus.A.in front of B.in the front of C.at the bank of D.at back of