Instruction

Select the best answer to complete the sentence.

1. She looks young, in -------- she is over fifty.

2. -------- this machine, we can do that difficult task.

3. It won’t be long -------- the Chinese economy overtakes the Japanese economy.

4. I ------- his behavior in the waiting room to see how he communicates with others.

5. Mr. White was -------- president of the committee.

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