Put in the proper tense form of the verb according to the adverbial or clause in each of the sentences.The professor ___________ (explain) the questions to the students already.
举一反三
- The professor ____________ the questions to the students already.
- The professor _____ the question to the students already. A: was explained B: has explained C: explain D: being explained
- The professor ___ the questions to the students already A: explains B: has explained C: had explaind D: is explaining
- Fill in each blank of the following passage with the proper form of the verb given in blackets, paying special attention to the sequence of tenses.
- Which of the following sentences is NOT an adverbial clause of concession（让步状语从句）?