-This kind of sports is exciting.
-Yes, but it's dangerous. One can't do it_______ he or she has got some training.
A、ifD
暂无解析
Whose eraser is this?
--It's ________.
句子翻译：让我一个人待着，以便我能想出一个好主意。
The money will be used to help the people _____ lost their homes in the earthquake( 地震).
句子翻译：我认为这是我所看过的最有趣的电影。
I'll arrive at 10:00 a. m. tomorrow. Will you please meet me at the airport?
------___________.
