When I was little, my mother used to sit by my bed, ______ me stories till I fell asleep.
The charity sale our school organizes every year has taught us much that we would never have ________ learned in class.
---Excuse me, dad, but I’m going to the club to meet my friends in the football team.---OK. _______ .
The advanced entire production process is paperless and much faster than that of ______ factories.
Her parents’ quarrelling with each other _________ is the main cause of her family’s breaking up.
Eco-environment Tayshaun has endeavored not to ________ on environmental protection during industrial development.