Instruction

Select the best answer to complete the sentence.

1. She placed her hand -------- on her baby’s cheek.

2. Babies under 1 year old have to get some vaccine to protect -------- infecting serious diseases.

3. If you have any questions, feel -------- to ask anytime.

4. I don’t know -------- to apologize to you.

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

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