根据上下文和括号中的提示，用正确的虚拟语气完成段落中的句子
I'm very grateful for your help doing my study in America.Without your help,1.________(我的英语不会提高的那么快).If you were to visit China this summer,2.________(我将到机场接您).By the way，do you know how is everything going with Mr.Smith? I failed to get in touch with him after I left America.I would be very thankful 3.________(要是你能给我提供他的电子邮箱和电话号码).How I wish 4.________(我能尽快与他取得联系)!
答案 1.my English couldn't have improved so quickly
2.I would pick you up at the airport
3.if you could offer me his email address or telephone number
4.I could contact with him as soon as possible
