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1. The research is so designed that once _______ nothing can be done to change it.

1. The research is so designed that once _______ nothing can be done to change it. A. begins B. having begun C. beginning D. begun 2. The eighteen-storied building, when ____, will shut out the sun lighting up the rooms in my house. A. completed B.to be completed

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????????????. Ellipsis. 1. The research is so designed that once _______ nothing can be done to change it. A. begins B. having begun C. beginning D. begun 2. The eighteen-storied building, when ____, will shut out the sun lighting up the rooms in my house.

335 views • 19 slides

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366 views • 17 slides