These oranges look nice, but very sour.

Though its economy is speeding fast, China’s average family income is far below ________ of the developed countries.

Yesterday I walked _______ Tommy’s table and _______ his bowls and dishes.— Be careful next time.

do you think of the lecture–____but interesting, but I’ve managed to survive it

You should inspect the wheels regularly, and replace them ______ they cause you trouble.