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tonnuquynhnhuct2206
2 năm trước
tong so hat proton ,notron,electron trong tu X la 28 hat ,trong do so hat khong mang dien la chiem sap si 35% tong so hat .So hat moi loai trong nguyen tu X la bao nhieu
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1) Complete the sentences with the verbs given in the correct form. 1) I____________hurndreds of email in my life. I____________ten last night ( write ) 2) I____________my homework when I came home, but I ( not )__________the wshing up yet.( do ) 3) We___________Chinese food last week, but we ( never )____________Japanese food. ( have ) 4) My brother______________two CDs already. He____________the first one two years ago. ( make ) 5) My parents______________me lots of nice present. Last year, they______________me a DVD player. ( give ) 6) My friend______________a lots of countries. Last summer, she______________to India. ( go) 7)"____________you____________the tennis match yesterday ? "-" No. I ( never )_____________a match against Jack ." ( win ) 8)_____________you___________a concert last weekend ?_____________you ever__________in the USA ? ( play )

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