Which sentence uses the past form of the verb stand? A. The guard is standing at attention in front of the palace. B. The guard
stood at attention in front of the palace. C. The guard standed at attention in front of the palace. D. The guard has stood at attention in front of the palace.
My last answer was deleted for being pointless, but I had to add more letters for the correct, succinct answer to be published. The right answer is "a sentence".
