My sister met him in the hospital yesterday afternoon, so he _________ your lecture.

The bus ____ at six, but it arrived an hour later.

—What have you learned from your experience in Thailand?—Well, meeting people from another culture ______ be very difficult．

--- It’s so late. Our son______ be back!--- Don’t worry. I dare say he ______ have some extra work to do.

--Pauline has lost her phone.  –No. It’s in her bag. I _________ hear it.