From the words lettered A to D choose the word or group of words that best completes the sentence. I started writing at 9.am. It is now 10am, by 11a.m. I .....

From the words lettered A to D choose the word or group of words that best completes the sentence.
I started writing at 9.am. It is now 10am, by 11a.m. I ... writing for 2 hours

Answer Details

The best option to complete the sentence is "will have been." Explanation: The sentence suggests that the speaker started writing at 9 a.m. and the current time is 10 a.m. The sentence is in the future tense as the speaker is talking about what will happen in the future. The speaker intends to continue writing until 11 a.m., which means that the writing duration will be two hours (from 9 a.m. to 11 a.m.). Therefore, the correct form of the future perfect tense to use in this sentence is "will have been." The phrase "will have been" refers to a future action that will have been completed at a specific time in the future (in this case, at 11 a.m.). So, the complete sentence is: "I started writing at 9 a.m. It is now 10 a.m., by 11 a.m. I will have been writing for 2 hours."