The drilling in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental ______ and severe cold.

He eats hardly enough to keep body and _____together.

Classical novels often have ________ which add interest, tension, or deeper meaning to the  text; mist is one in Great Expectations.

 The CASS said the scores were based on corporate responsibility and financial reports,. But some people raised__________ about whether the information was reliable. 

Great ________ should be made to speed up higher education to meet the needs of industry and agriculture.