—The poor weather was _________ responsible for the crash.—I’m with you on that. Carelessness was also to blame. 

— Would you come to our party tomorrow, Della?— I’m afraid I can’t afford the time, but thank you for the invitation _______.

I live in a faraway village, and only go to visit my parents ______.

 People say that young Chinese students’ eyesight keeps dropping _________ because of both too much homework and poor learning conditions.

As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.