精选优质文档-倾情为你奉上2016届南通、扬州、泰州高三第三次模拟考试 第二部分:英语知识运用(共两节,满分35分)第一节:单项填空(共15小题;每小题1分,满分15分)请认真阅读下面各题,从题中所给的A、B、C、D四个选项中,选出最佳选项。()21. I sometimes call my son abroad, but its expensive. Why do you waste money _ you could easily use Wechat or QQ?A. while B. unless C. until D. when()22. Alice went fishing in the company of her father early in the morning and she _ life lessons along the way.A. was learning B. has learned C. is learning D. had learned