—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
_____________ his homework, the boy was allowed to watch TV.
. ----Your shoes are not worth ____________.----Well, I’m considering buying a new pair.
He ________ be more than thirty------ he looks so young, just like a teenager!
_________ I traveled by boat, I got seasick.
What a good idea it is that Sarah and Dave are supposed to ______________ as movie characters for the party.