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tamtit1412
2 năm trước
“My father doesn't work in the factory any more,” Bella told us.
A.Bella said that her father no longer worked in the factory.
B.Bella wished that her father didn't work in the factory any more.
C.Bella hoped that her father was used to working in the factory.
D.Bella denied that her father used to work in the factory.
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Các câu hỏi liên quan

a) Cho các số thực \(a,\,\,b,\,\,c\) thỏa mãn \(\frac{a}{{b - c}} + \frac{b}{{c - a}} + \frac{c}{{a - b}} = 0\). Chứng minh rằng:
\(\frac{a}{{{{\left( {b - c} \right)}^2}}} + \frac{b}{{{{\left( {c - a} \right)}^2}}} + \frac{c}{{{{\left( {a - b} \right)}^2}}} = 0\)
b) Tìm tất cả các bộ ba số nguyên dương \(\left( {a;\,\,b;\,\,c} \right)\) thỏa mãn:
\(a \le b \le c\) và \(\left( {1 + \frac{1}{a}} \right)\left( {1 + \frac{1}{b}} \right)\left( {1 + \frac{1}{c}} \right) = 2\).
A.\(\left( {a;b;c} \right) \in \left\{ {,\left( {2;\,\,5;\,\,9} \right),\,\,\left( {2;\,\,6;\,\,7} \right),\left( {3;\,\,3;\,\,8} \right),\,\,\left( {3;\,\,4;\,\,5} \right)} \right\}\).
B.\(\left( {a;b;c} \right) \in \left\{ {,\left( {2;\,\,5;\,\,9} \right),\,\,\left( {2;\,\,6;\,\,7} \right),\,\,\left( {3;\,\,4;\,\,5} \right)} \right\}\).
C.\(\left( {a;b;c} \right) \in \left\{ {\left( {2;\,\,4;\,\,15} \right),\,\,\left( {2;\,\,5;\,\,9} \right),\,\,\left( {2;\,\,6;\,\,7} \right),\,\,\left( {3;\,\,4;\,\,5} \right)} \right\}\).
D.\(\left( {a;b;c} \right) \in \left\{ {\left( {2;\,\,4;\,\,15} \right),\,\,\left( {2;\,\,5;\,\,9} \right),\,\,\left( {2;\,\,6;\,\,7} \right),\left( {3;\,\,3;\,\,8} \right),\,\,\left( {3;\,\,4;\,\,5} \right)} \right\}\).

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