-Thiskindofsportsisexciting.

-Yes,butit'sdangerous.Onecan'tdoit_______heorshehasgotsometraining.

I'llarriveat10:00a.m.tomorrow.Willyoupleasemeetmeattheairport?

------___________.

Beforeyouleavetheclassroom，please__thelights.

句子翻译：让我一个人待着，以便我能想出一个好主意。

MH370with239people_______(失去，丢失)contactonMarch8th,2014.