新概念英语：句子是否有误1.Hundredsofstepslea
1.Hundrs of steps lead to the high wall which surrounds the president's palace 2.However, he had at last been allowed to send a fax in which he informed the editor that he had been arrested while counting the 1,084 steps leading to the fifteen-foot wall
"Surrounds" is correct because the subject of this verb is "the high wall," which is singular and requires a singular verb. "Surrounded" is correct because the sentence is in the past tense. In addition, subject of this verb is "the fifteen-foot wall," which is also singular; so even if the sentence were in the present tense, "surround" would be incorrect because it is a plural verb.