From four underlined parts, choose the one that needs correction then correct it. Ever since the world began , nations have difficulty in keeping peace with their neighbors.

Conditional sentences Type 1: Put the verbs in the brackets in the correct form . If the police catch him, they.......................(arrest) him.

Complete the second sentence so that it has a similar meaning to the first one. . "How much do you think it will cost?" he said to me. - He asked me _____________________________

Which syllable usually has stress mark in these words? Do you realize the stress rule of the words with more than three syllable?

Make a phrase with each of the words in 1. waterfall: _________________

Put the verbs into the correct form. If you............ (find) a wallet in the street, what would you do with it?