Why were you late for school again this morning—I was about to go shopping _________ it began to rain.

Have you moved into the new office building?—Not yet .It ______

.－Jim!Did you have a good time at the party－Yes，but with all this work on hand，I really________there．

How many students did you see playingin/on the playground________

_______ the English examination, I would have gone to the concert last Sunday.