You look not a bit older than you did 5 years ago. How do you __________so young?

在行情预测过程中由已知的经济变量发展规律推出未知变量是基于（）

I don ’ t want to buy the sweater because I don ’ t like the color. __________, it is too expensive.

—You look very pale. You __________ very tired. — I didn ’ t sleep at all last night.

根据我国《对外贸易法》的规定，对外贸易救济措施不包括______

In the end I ______ a good effort to pass the examination .

下列各项中，属于我国禁止类投资项目的是______

下列技术中属于我国实行合同登记管理的是()

—Would you mind my sitting here ?

— ______ .