New ways have to be  found to  .............. of waste materials and poisonous gases so that we can have cleaner surroundings.

.............. her inexperience, her failure to secure the contract was not surprising.

It’s not called an unhealthy obsession, it’s called ............... (DEDICATE) 

She’ll be a millionaire by the time she _____ forty. 

Choose the best answer:
Studies of climatology indicate that volcanic dust in the atmosphere may contribute to the onset of ice ages.

Choose the best answer to complete the sentences.

Girls must all be sent to school because ________ will provide better opportunities.

After each ________, you need to reread what you’ve written and note your suggestions for changes.

The richer he is, ……… he gets.

Thanks to an effective advertising ............. in the 1880s, cigarette smoking became widespread.

Identify the error in each sentence: 

The scholarship that Wilson received to study history at Cambridge presented an unique opportunity

The company starts to employ a lot of.............

Martha Graham,_______of the pioneers of modern dance, didn’t begin dancing until she was 21.

The preparations ................  by the time the guests arrived.

Toxic chemicals in the air and land have driven many species to the ________ of extinction.

Although …… satisfied with the contract, the officials hesitatingly agreed to sign it.

Choose the best answer among A, B, c or D that best completes each sentence: Security is very important in this building. Don’t let anyone ….. they show you proper identification.

Mr. Kim lives on a boat;     __________     , he does not know how to swim.

Mary is ....... responsible as Peter.

Can we see (33)______ the earth is a globe? Yes, we can, when we watch a ship that sails out to sea. If we watch closely, we see that the ship begins (34)______. The bottom of the ship disappears first, and then the ship seems to sink lower and lower, (35)______ we can only see the top of the ship, and then we see nothing at all. What is hiding the ship from us? It is the earth. Stick a pin most of the way into an orange, and (36)______ turn the orange away from you. You will see the pin disappear, (37)______ a ship does on the earth.
(35)..................

 When people ask me why I like One Direction, too many................ just race through my mind, so I just wind up sitting there like: “I don’t know.” (THINK) 

The diagram shows it is ________ in the summer than in winter in the northern hemisphere