Hoàn thành những đoạn đối thoại sau

I.Hoàn thành  những đoạn đối thoại sau:
1.A:I'd like a magazine.
B:Well,...............(I/buy) one for you if ............. (I/go) to the shop later.
2.A:Has Jack phoned yet?
B:No,and if ................ (he/not/phone) this afternoon,................ (I/phone) him this evening.
3.Is Mary there,please?
B:No,but if ........... (you/want) to leave a message,......................... (I/give) it to her.
4.A:Is Tom going to pass his exam?
B:Well,................ (he/fail) if ................... (he/not/study) harder.
5.A:Could I have some information about this year's concerts,please?
B:Yes,if ......................... (you/fill in) this form,..............(I/send) it to you in the post.