The farmer had to wear heavy boots in the winter because the fields were too wet and________.

Forthenewcountrytosurvive,________foritspeopletoenjoyprosperity,neweconomicpolicieswillberequired.

Wemust______thattheexperimentiscontrolledasrigidlyaspossible.

She ________ her nervousness to the importance of the interview.

________ with the size of the whole earth, the highest mountains do not seem high at all.