The waste water, when _______，should be clean enough to meet standards.

s cat is so cute and lovely, but I don’tthink I have enough time to keep ______.

My father is lovely and________,but sometimes he is not patient________me.[ ]

The effect that 20 years ago the car accident ____ on him ___ being fully realized now[ ]

________ into English，the sentence was found to have an entirely different word order[ ]