根据句意,用方框内所给短语的适当形式填空
serveas,putforward,inthecentreof,drawoff
thevillagershadto________becauseoftheflood
thefenceroundthefarm________aprotectionfortheland.
Therearetwodesks________theclassroom
he_________somegoodideasaboutEnglishlearningyesterday
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