Can you _________your pet dog at the weekend

Space exploration has been made _____with the development of modern science and technology. [ ]

The washing machine is of excellent quality. If there __________ be any problem within the first three years, we would fix it for free.

________the advice of doctors, he left the hospital early and soon he got even worse.

If we learn to appreciate _____ isnew and different, we will be well-prepared for ____ the future may have instore.