摘要： He focused his effort the house sale for fear that the prices of them would go up suddenly. A. on; for B. on; in C. to; for D. to; in
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He focused his effort ____the house ___sale for fear that the prices of them would go up suddenly.
| A．on; for | B．on; in | C．to; for | D．to; in |
He focused his effort ____the house ___sale for fear that the prices of them would go up suddenly.
|
A．on; for |
B．on; in |
C．to; for |
D．to; in |
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