Where is Jack?I can't find him anywhere.he___his homework upstairs.A must have done B must be doing我知道这里应该选择must be doing 理解为他正在楼上做作业.可是为什么不能选择must have done呢?这里不是问JACK在哪里吗

Where is Jack?I can`t find him anywhere .---He ___his homework upstars怎么填 where Jack is和where is Jack哪个对Can you tell me _________? （ ）1.Please remember me to your father.Thanks.I _______.A.do B.put C.will d.am( ) 2.Can you tell me _______?He is in the library.A.where was Jack B.where Jack wasC.where is Jack D.where Jack is( ) 3.Must I finish my homework before 9:00?No, where is jack?i can't find him anywherehe___his homework upstairsA might be doing B must do 选什么 why 是不是错了 I can't find Miss Li. Where is she? Maybe she _____(read)in the library.Mary _______(not pick)apples.She ______(hold)the ladder for Jack. Jack is high up in the tree now. I can't____my pen.where is it?I can't find my pen.where is it? I can't find_purse.Where is it?I can't find_purse.Where is it. where is jack he has gone either beijing or to heinan ,but i am not sure________ . Where is jack?----_______in music class. Where is Jack?He __________ his country. Where is the key ( )the gate,Jack? Is this( )bike,jack?No,you can ask Tom.I think it is( )bike? where is the shoulder that I can cry.. where is my english book i can't f- it Where is my cat? I can't () it Where is [ ] book?I can it find it. Advil is available in china?where can i buy it? I can't f_____my coat.Where is it?