Fire can____ down a lot of trees. It can____ people, too. We must be____with fire. We mustn't____ in the forest. We mustn't play____ fires at home. We mustn't play with matches either.
“黄沙百战穿金甲，不破楼兰终不还。”这是唐诗中的名句。然而楼兰古国在唐代以前已销声匿迹，留下了千古之谜。楼兰国的兴盛在很大程度上得益于
机遇总是青睐有准备的头脑，深信电磁间有联系且坚持探究并最终无意间发现电流磁效应的科学家是（ ）
–Excuse me, can I take this seat? –Sure. _________.
