1) Each sentence has ONE mistake. Find the mistakes and correct them. Ex: My teacher advised me study hard for the next semester. study -> to study 1. The children laughed happy when they heard the funny story. . 2. If the streets will be full of trash, we will heap it and burn it down. 3. Who is going to look for your children while you are away?. 4. Nam studies very hardly, so he always gets good marks 5. We suggest to plant more trees along the streets