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 －Look! How busy the building workers are!

－Yes, I see. The houses ____ by them will be completed next week.

A. built     B. being built   C. to be built             D. having been built

－Look! How busy the building workers are!

－Yes, I see. The houses ____ by them will be completed next week.

A. built   B. being built  C. to be built         D. having been built

－Look! How busy the building workers are!
－Yes, I see. The houses ____ by them will be completed next week.