Train services are usually ________ and run regularly every day.

People are advised to be _____ towards the health concerns of their dear ones while burning firecrackers to celebrate the festival, for they contain harmful chemicals．

Though he is busy, he is very _____ and makes a telephone call to his parents from time to time and tries his best to spare some time to visit them.

The questions which are ________ to yours are not easy to answer. 

—Shall we go to see him right now?—I’m afraid not. This weekend may be a ____time