You had better ______some time every day for sports so that you can keep yourself energetic.

 Some modern art is so abstract that the painter only concentrates on certain qualities of the object, using colour, line and shape to _______ them.

 We'd better grow the plant in a ________ plastic box so that the children can see the roots growing.

(2013·青岛高三统一质检)—Robert is indeed a wise man.—Oh, yes. How I regretted ________ his advice.

Life isn’t meant to be easy and you have to _______ some pain to 1earn the skills to move forward.