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thanhhiennhon
2 năm trước
X la kim loai co hoa tri khong doi. trong hidroxit cao nhat, X chiem 54,05phan tram ve khoi luong. vay X la Mg,Ca,Fe,Ba
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Dr. Lai is a dentist. She (41) __________ after people’s teeth. Dr. Lai’s (42) __________ is clean and tidy, and so is her uniform. Most children are (43) __________ when they come to see Dr. Lai, but she is a (44) __________ woman. She (45) __________ what will happen, so they are not afraid. Dr . Lai often gives (46) __________ advice. She tells them (47) __________ to look after their teeth. She reminds them to (48) __________ their teeth regularly and eat sensibly. 49. What does Dr. Lai do?  _________________________________________________ 50. How is Dr. Lai’s surgery?  _________________________________________________ 51. How do most children feel when they come to see Dr. Lai?  _________________________________________________ 52. Does she often give children advice?  _________________________________________________ 53. What does she tell them?  _________________________________________________ 54. What does she remind them?  _________________________________________________

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