How long ________ they ________ (dig) the ditch?
have … been digging
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A great number of small power stations ________ (set up) in their county since liberation.
Herefusedtotelluswhetherhe________(undertake)thejob.
He ________ me that he decided to leave on Monday.
A beam of light will not bend round corners unless ________ (make) to do so with the help of a reflecting device
Wood does not conduct electricity; ________.
