【简答题】The tide has ___ and left many beautiful shells on the beach. A.preceded B.conceded C.receded D.proceeded 2.Hope of finding the missing passengers is now beginning to ___. A.reduce B.fade C.faint D.sh...
【单选题】.The policeman asked the old man what he ___________ doing when the accident ___________. A. is; occur B. was; occurring C. is; has occurred D. was; occurred