Question

1. Change the verbs in brackets into the simple past or the past continuous.
Philips Petroleum (1) (enter) the plastic’s business quite by accident. In June 1951 two young research chemists were (2) (look into) ways of producing a more efficient fuel. To their surprise they (3) (notice) that a sticky white substance (4) (block) their laboratory equipment. They immediately (5) (see) the value of their discovery. They carefully (6) (record) the results as the process (7) (happen). They (8) (call) the resulting plastic polypropylene and soon after (9) (make) polyethylene. In 1953 Philips (10) (invest) $50m to build the first giant factory. Nowadays these substances are the basis of a wide range of plastics.
2. Read the story and make questions for the answers. Food chain: A chicken ate a worm, but then an explorer ate the chicken for lunch. A cannibal then ate the explorer. Then, when the cannibal swam across the river a crocodile ate him! Example: What / chicken eat? A worm What did the chicken eat? 1 What / the explorer eat? A chicken.
2 Who / eat the chicken? The explorer.
3 Who / eat / the explorer? The cannibal.
4 What / eat the cannibal? A crocodile!
5 What / the crocodile eat? The cannibal