【单选题】With the world _____ fast, we have something new to deal with all by ourselves every day.
【单选题】如图 2-18 所示电路,求电流 I 的值( )
【单选题】We have ____ friendly relations with many countries in the world.
【单选题】The world will be different, and we will have to be prepared to ________ to the change. [ ]