Thomas Edison ... two thousand different materials in search of a proper filament for the light ... His assistant complained, " All our work is useless". Edison replied ..., "Oh we have come a long way and we have learned a lot. We know that there are two thousand elements which we cannot use to make a good light bulb".

24. To tell the condition as, what the are the writer mostly expreses them in ....

From the text it can be concluded that ...

The word encounter on the paragrap has similar meaning to…

Fill in the blanks with the right word. Don’t forget to change the verbs into past tense when necessary. Do not betray me. Be loyal to our agreement. Your betrayal will ____me. I can be really a...

Match the words in the left column with the synonyms on the right column. Then, compare your work to your classmates. a. waiting room b. come or arrive c. sing together d. get along e....