Rewrite the following sentence using the correct tense of the verbs givenin the brackets: We had been walking for about ten minutes when we suddenly ______ (realise) we _____ (move) in the wrong direction.

The correct answer is: C. realised, had moved

The sentence is in the past perfect tense, which is used to talk about an action that happened before another action in the past. In this case, the first action is “we had been walking for about ten minutes,” and the second action is “we suddenly realised we were moving in the wrong direction.” The past perfect tense is formed with the past participle of the verb (in this case, “realised”) and the past tense of the verb “to have” (in this case, “had”).

Option A is incorrect because the verb “realise” is in the simple present tense, which is not used to talk about actions that happened in the past.

Option B is incorrect because the verb “realised” is in the simple past

tense, which is not used to talk about actions that happened before another action in the past.

Option D is incorrect because the verb “realised” is in the past progressive tense, which is used to talk about actions that were happening at a specific time in the past. In this case, the sentence is not talking about an action that was happening at a specific time in the past, but rather an action that happened before another action in the past.