The number of people in the world ________ about 6 billion and large quantities of waste ________ each year.[ ]

154 The primary school pupil________usthrough the narrow streets to the central mosque

_____ at the door before you come into the room

Tomorrow is ________, so I want to give a present to Miss Li.

He used to be ________ UNICEF worker, but now he is really ________ excellent basketball player.