—I haven’t heard from Henry for a long time.—What do you suppose________ to him?
What do you mean, there are only ten tickets?There________be twelve.
—________ I take the book out? —I'm afraid not.
Doctors say that exercise is important for health, but it ________ be regular exercise.
One of our rules is that every student ________ wear school uniform while at school.
The new law states that people ________ drive after drinking alcohol.