将电压表和电流表的符号填入如图所示的电路中的圆圈内。要求:开关S闭合后,小灯泡L1和L2并联,且都能发光。
用所给词的适当形式填空____ Why all the _________ (smile) faces? .____ We will take __________(turn) to clean our classroom.____ These stories end with ___________(happy)and laughter .____ ________ (wear) different colors of clothes can affect our feelings.____ I ______________(not,pass) the English exam,so I was so sad.