[ Grammar ]
A：＿＿＿ you help Lucy ＿＿＿ the floor? B：Of course, I will.
A. Do; mops
B. Did; mopped
C. Are; mopping
D. Will; mop
Select your answer:
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The threat of global warming will eventually force the US to slow down its energy ___________.
A. consumption
B. norm
C. sector
D. subscription