The farm as well as its neighbouring hills we once spent so much time _____ on a new look as recently as last year.
| A．on has taken | B．has taken | C．on having taken | D．having taken |
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The farm as well as its neighbouring hills we once spent so much time _____ on a new look as recently as last year.
| A．on has taken | B．has taken | C．on having taken | D．having taken |
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