题目

【小题1】It’s impolite to __________(指) at people with your fingers.【小题2】Don’t___________ (插) your chopsticks into the food.【小题3】You can put your toys in the__________ (空的) box.【小题4】Would you___________ (介意) opening the windows?【小题5】Bob is an honest___________ (人) in our class.We all believe him. 答案：【答案】【小题1】point【小题2】stick【小题3】empty【小题4】mind【小题5】person【解析】【小题1】指向某人是point at sb。故答案为point。【小题2】把------插入------用stick---into---。故答案为stick。【小题3】空的用empty。故答案为empty。【小题4】介意，在乎用动词mind。故答案为mind。【小题5】一个诚实的人可小强做声学研究实验，拿了一个空的可乐瓶，并去掉瓶底，给开口处蒙上橡皮膜并扎紧，让瓶口对着蜡烛的火焰，敲打橡皮膜使其振动发声．（如图所示）小强可以观察到的实验现象是：                             ，这个实验说明：                                     ．