A boy ___ to music while riding. While the lights ___ to red, a car suddenly ___. But the driver___ on the phone while driving, Luckily, the driver stopped ___ , but the boy ___ and hurt his knee. Step 8 Group dis...
③in the front of(内部)在...前面 (指内部) The driver is sitting in the front of the bus. 司机坐在公共汽车的前面。 ④at the back of 在...后面 (指内部) She is cleaning the blackboard at the back of the cla...