MCQOPTIONS
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| 1. |
In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement"._x005F_x000D_ Tunnels (is built) to connect houses and places of worship whereas innovative trick doors were attached to the underground cities. |
| A. | was built |
| B. | were built |
| C. | were building |
| D. | no improvement |
| Answer» C. were building | |