We _________the roof of our house last night, we’re going to complete it today.
A.
repaired
B.
had repaired
C.
would repaired
D.
were repairing
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【单选题】The needle valve in a fuel valve will _____ when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
【单选题】The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means _____.