1 . 不借助面部表情就能清楚地表达自己的观点会很难。
To________yourself________without using facial expressions can be very difficult.

2 . 使他脱颖而出的是他精通几门语言。
_______ _______ _______ _______ _______is his mastery of several languages．（根据汉语意思完成句子）

3 . The rapid development of science and technology _______________for us to do what we couldn’t do in the past. （使…成为可能）（根据汉语提示完成句子）