1.

S1: One of the most dangerous insect pests is the locust.P: At first they look just like ordinary grasshoppers, which are harmless and unable to fly very far.Q: Until about thirty years ago, no one knew where locusts came from or why they appeared in the different countries they attacked.R: Then they change in appearance and develop wings which enable them to fly long distance.S: Then it was discovered that there are two stages in the life of locusts.S6: At this stage, they gather in huge numbers and rise from the ground on theri powerful wings in cloud.The Proper sequence should be:

A. SQR
B. SRQ
C. SPR
D. SRP
Answer» D. SRP


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