You ________ go now. It ’s getting late.
A、hadratherC
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he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.
Howlong________they________(dig)theditch?
Wooddoesnotconductelectricity;________.
Those who’d like to visit the exhibition ________ (sign) your names here.
Only when you have obtained sufficient data ________ come to a sound conclusion.
