Instruction
Select the best answer to complete the sentence.
1. Very few schools in the US -------- the term primary school as part of their name.
2. China changed significantly in the -------- half of the 20th century.
3. The world is -------- with the challenge of protecting the environment.
4. It won’t be long -------- the Chinese economy overtakes the Japanese economy.
5. I never said that taming a tiger would be a -------.
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