—Have you written anything on Chinese traditional medicine so far?— _________, but I have a plan for it.

 As to the question of whether we will sell our house or who we shall sell the house to, you ____ have answer by tomorrow.

Someone is knocking at the door. It     my sister. It's time for her to be back.

 —Must we finish the project in a month?—No, you _______. 

Students ________ remain in their seats until all the papers have been collected.