Complete the second sentence so that it has a similar meaning to the first one. Unless he takes these pills, he won't be better. - If ______________________________

Conditional sentences types 1 and 2: Put the verbs in the brackets in the correct form. If you leave your glasses there, someone.......................(sit) on them.

Write a sentence with if for each situation. Road travel is cheaper than rail travel in this country, so we have lots of traffic jams.

Conditional sentences types 1 and 2: Put the verbs in the brackets in the correct form. Unless he.......................(come) with me, I'll probably get lost.

Write a sentence with if for each situation. The wind is blowing hard, so I won‟t take the boat out for a ride.

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.