It is very kind _______ you to help me withmy housework It is hard _____me to do allthe work

When it _____ renewable energy, what occur to me are solar energy and wind energy.

The pull of gravity depends upon size, _______, upon mass. An object, whether its mass is big or small on the earth, ________in weightless conditions, like the outer space.[ ]

_______ travelling expenses rising a lot, we had to change all our plans for the tour

She may have been caught in the heavy traffic, ____ she won’t arrive here by five o’clock.