21.   By the end of the lecture the back of my book was covered in little doodles.

22.   Chemometrics and analytical data extraction are the main topics covered in the computer corner.

23.   Cover them in green icing sugar.

24.   Covered in a kind of prickly heat.

25.   Down the hall on each side were long trestle tables covered in the costliest silk.

26.   Each chapter begins with a brief outline of the topics covered in the chapter.

27.   Everything was covered in a thick layer of dust.

28.   Everything was filthy and covered in dust.

29.   Fields covered in snow would swallow up whitewashed farmhouses were it not for their black window frames.