It was in the lab ___was taken charge of by our teacher____ they did the experiment.
— Is it all right if I come at about 8.30 ? — No, I ________ the football match then.
He was very busy, and________he didn’t go to the party that night.
America was_________was first called “India” by Columbus.
It seems water___from the ceiling for some time . We’ll have to climb to the roof with a ladder.
To pass the exam, Li Hua had a busy week ______ to the radio and the tape.