小芳收集了一些衣料的纤维，各取一部分做燃烧实验。下列衣料纤维中。燃烧后能够闻到烧焦羽毛气味的是()

-This kind of sports is exciting.

-Yes, but it's dangerous. One can't do it_______ he or she has got some training.

某班地理知识擂台赛，据下列四位同学的叙述，你认为谁将先被淘汰出局?（）

There are few _______in the fridge. Let ’s go and buy some peas ，carrots and cabbages.

雅鲁藏布江谷地一带种植的青稞和小麦穗大粒饱的原因是（）

Mom asked me to _____________ grandpa when she w as out.

关于聚落的发展与保护说法正确的是[]

关于世界降水量分布的叙述，正确的是()

下列仪器中，不能用于加热的是（）

------ Why are you so late? I have waited for more than an hour.

--------_____. I got up late and missed the bus.