John, you shouldn’t think ________ about yourself.–Sorry, Mr Black. I’m really __________ selfish. But I’ll try to think more about others.

He promised to tell me by himself when I ______

You mustn’t ________ the key words while copying the composition.[ ]

Why does the lake smell terrible? —— Because large quantities of water _________.

Occasions are quite rare ________ I have time to spend a day with my kids.