MCQOPTIONS
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| 1. |
Improve the bracketed part of the sentence._x005F_x000D_ By the end of this decade, doctors surely (must have discover) a cure for cancer._x005F_x000D_ |
| A. | would have discovered |
| B. | could discover |
| C. | have discovered |
| D. | no improvement |
| Answer» B. could discover | |