—I missed the first part of the film. It was really a pity.—You __________ home half an hour earlier.
Stephen Hawking believes that the earth is unlikely to be the only planet______ life has developed gradually.
The lawyer listened with full attention, ______to miss any point.
That is the only way we can imagine______ the overuse of water in students’ bathroom.
—Peter, where did you guys go for the summer vacation? —We ______busy with our work for months, so we went to the beach to relax ourselves.
Many buildings in the city need repairing, but the one ______first is the library.