Detective Lu is busy writing a _____________ on the murder.

My TV set doesn’t work, the water tap is dripping and my car is still under repair!–-You sure ________ bad luck these days

Humans must first of all eat, drink, have houses and clothing, _____ they can pursue politics, science, art and religion.

Vegetables _____many kinds of vitamins and many other useful materials, so we must eat them______．

It was the skills that he had acquired at his training periodenabled him to get such a high post in that world-famous company.