Be _______ — you can’t expect me to finish all this work in so little time.

Old people need special care in winter, as they are very______ to sudden change of the weather.

The instructor asked us to list anything in our past that we felt ______ of，regretted and read our lists aloud.

Jack is late again. It is ________ of him to keep others waiting.

The microphone enabled them to keep in touch, in other words, it made it _____ for them to contact each other.