This machine was used ——-years ago.

nservation area is very important for preservingmany animals and plants, which would ______ run the risk of becoming extinct

I saw one of the guests go through thekitchen door ______ on the light.

Who do you think should ____ theresponsibility for white pollution— Both the producer and the consumer.

Do you need any help, lucy –Yes. The jobis _____I could do myself.