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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