—As is reported, retirement age should be put off immediately.— Easier said than done.We take ___________all factors into consideration, we shall be faced with some other social problems.

题型：单选题题类：常考题难易度：普通

江苏省涟水中学2017-2018学年高一下学期英语第一次质量检测试卷

—As is reported, retirement age should be put off immediately.

— Easier said than done.We take ___________all factors into consideration, we shall be faced with some other social problems.

A、unless B、until C、if D、once

举一反三

—I don't know，but I'll let you know if he ________.

—Good idea, ___you can afford the time.

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