MY VOCAB PRACTICE

1. The retrorocket helped to ensure that the spacecraft for China's first moon mission landed smoothly.

2. The increase in the goods and services tax was made retroactive to 1 March 2019, even though it was approved by parliament on 8 March 2019.

3. The students were told to write a retrospective essay of their high school years before their graduation ceremony.

4. The retrograde orbit of a distant planet outside our solar system puzzled many astronomers.

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