He is sweating heavily. He _______ weightlifting for a long time.
______ left before the deadline, it doesn’t seem likely that John will finish the job.
Medical ______ shows that men are more likely to have heart attacks than women.
Several years had passed ______ I finally realized the true value of friendship.
It’s a mistake to think of Chongqing only ______ its tourist attractions.
All passengers ______, please fasten your seat belts and remain seated ______ the plane is landing.