（在祈使句中）before enter the house 还是 before entering the house 还

（在祈使句中）before enter the house 还是 before entering the house 还 before you e---- the house 用enter 还是entered came before the house he r_____ the mud from his shoes before entering the house.填 you enter the house enter into the empty house对还是enter the empty house对 ____ at the door before entering,please We should k____at the door before entering. This is the house that he lived before the war. i remembered ______ the door before i left the house Before the Spring Festival,parents often clean the house and The workers are trying to finish ( )the house before Friday,