The thief took away the woman ’s wallet without ________.
A、beingseenA
without是介词，其后的动词必须用动名词形式。根据句意，此句需要用被动形式，所以答案是A。
The basic unit in the study of morphology is ______.
Werefertothelimitedrangeofsoundsasthephonicmediumoflanguageandindividualsoundswithinthatrangeas______.
Thesyntacticrulesofanylanguageare______innumber.
Countrylifeisbetterthancitylife________itoffersfreshairandnoiselessenvironment
Country life is better than city life ________ it offers fresh air and noiseless environment
