两台以上推土机在同一地区作业时，前后距离应该大于（）米;左右距离应该大于（）米。在狭窄道路上行驶时，未经前机同意，后机不得超越。
A、825Byjointeffortswecan___bothfriendshipandbusiness.()
Themissingboyswerelastseen________neartheriver.
WepreferChinesebicycles __Japanesebicycles ___theirfinequality.
OneofthedisadvantagesintheGrammar-TranslationMethodisthatthetextsaretakenfrom_____,thelanguageofwhichdoesn'toftenmeetthepracticalneedsofthelearners.
翻译：Wesendyouabrochureonthevariouskindsofbicyclenowavailableforexport
