As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
Only ______ a human being.
My English teacher gave us a suggestion yesterday, _____is often the case, ______our monitor organize a debate after class.
It was three months later _____ he completed the job with difficulty.
It ___________last night, for the ground is wet outside.
From his ______ look, we could see that he hadn’t expected that we could raise such ______questions to him.