—Would you have come to his help, had you been free? —Yes. But I______ engaged. 

 I am disappointed because I ________my favourite writer yet.

 For the sake of enough time for study and rest, students are _____ from using cellphones in our school.

---Have you moved into the new house?  ---Not yet, the rooms ___.

--Is your dad at home? --No, he_________ out.