One is expected to behave _________ on some special occasions

I wonder ________ Mary has kept her figure after all these years.—By working out every day.

We try and give them ______ they want, _______ their religion is, so that they can face death without fear

We can save water by taking shorter showers.-_______, turning off the tap when brushing teeth is also a good way.

We will see __________ even stronger China in __________ near future.