①山脉：A ___ B ___ C ___ D ___

①山脉：A ___ B ___ C ___ D ___ （a+b-c-d）*（a-b-c+d）=[（___）+（___）]*[（___）-（___）]?括号内填什么? %>___ ___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D. Don't shout in the hallway,___ ___?A.shall we B.will you C.d He ___?___ in Sichuan A.live B.living C.lives D.to live 选哪个? I ___ think you are ___ right.A.don't;/ B.am not;/ C./;not D What class ___ your friend ___ ?A.is ;in B.are;in C.is;on D. 下列说法不正确的是___.A.B.C.D. exl公式求救需要用公式完成以下要求 A B C D E F G 1___序号___名称___东___南___西___北 填空 A:Is that an apple?B：___,___ ___.Please ___ ___.A:Is that look this is a slowly train.———— ___ ___ ___ A B C