4. Complete the sentences using the new words. 1. The first t is always most difficult becauseyou begin to study after summer. 2. Help me to cthe rubbish from the garden. 3. The greenhouse effectmay become a d_ for the world. 4. The room is inWhat have you been doing here? 5. Don'tthe child by giving him too many presents.6. The teacher p_ the student for his report on ecol-ogy. 7. You are interested in history, aren't you? Whydon't you join our history s ? 8. After the partythere was a p.of dirty dishes in the kitchen.a m​