Whatever you do, ________ is difficult if you put your heart into it.

Where did you go on vacation?–I ___________.

The Qing Dynasty (AD1616-1911) had ten emperors altogether, nine _____ are buried in the two groups of tombs in Hebei Province.

Rather than _______in the city, the old man would prefer______in the countryside.

To my mind, she is the most wonderful teacher that I’ve ever known, _________ is able to get across to her students ________ she really thinks and means.