完形填空。Hello！My1isDavid.IaminNo.12MiddleSchool.Here2aphotoofapen.Isitmine？3．Itisnotmypen.ItismygoodfriendAnna's.Shelost4penintheschoollibrarythismorning.Itisblack.Nowshec
完形填空。
Hello！My __1_ is David. I am in No.12 Middle School. Here __2__ a photo of a pen. Is it mine？__3__．It is not my pen. It is my good friend Anna's. She lost __4_ pen in the school library this morning. It is black. Now she can __5__ it. I can e－mail her about it __6__ anna808@tom.com.
I found a _7__ of keys in Classroom 7C this afternoon.__8__ yours？My phone number is 798－5546.Please __9__ me. You can __10__ the teacher for them，too. Thank you!
( )1.A.name B．number C．game D．card
( )2.A.be B．is C．are D．am
( )3.A.Hello B．OK C．Yes D．No
( )4.A.your B．his C．her D．my
( )5.A.meet B．find C．spell D．say
( )6.A.to B．at C．in D．for
( )7.A.notebook B．computer C．set D．cup
( )8.A.That is B．Are they C．Is that D．They are
( )9.A.see B．help C．excuse D．call
( )10.A.ask B．have C．thank D．please
1A 2B 3D 4C 5B 6B 7C 8B 9D 10A
向量空间证明题怎么证明?设α1,α2...,αn和β1,β2,...βn是n维列向量空间R^n的两 2020-05-13 …
设A=（aij）n×n为实矩阵，已知aii>0（i=1，2…n），aij<0（i，j=1，2…n； 2020-05-14 …
设L是xoy平面上的一条光滑曲线弧，函数f（x，y）在L上有界．用L上的点M1，M2，…Mn-1把 2020-05-16 …
下列各项，注音有误的一项是（）A．ān谙习àn黯然àng盎然ái白雪皑皑B．ài狭隘āo凹陷báo 2020-07-06 …
定义如下运算：其中zij=xi1y1j+xi2y2j+xi3y3j+…+xinynj．（1≤i≤m 2020-07-23 …
(A/P,i,n)=(A/F,i,n)+i或(A/F,i,n)=(A/P,i,n)-i我已经知道怎 2020-07-23 …
已知全集I=N，集合A={x|x=2n，n∈N}，B={x|x=4n，n∈N}，则（）A．I=A∪ 2020-07-30 …
Hello!I'mRenLijuan．R-E-N，Ren．L-I-J-U-A-N，Lijuan．I' 2020-10-30 …
求证e^i(4π/n)+e^i(8π/n)+...+e^i4(n-1)π/n+e^i(4nπ/n)= 2020-11-01 …
在一个长度为n的顺序表中，在第i个元素（1≤i≤n+1）之前插入一个新元素时需向后移动的元素个数是( 2020-11-11 …