[单项选择]What were the villagers doing when the explosion occurred（　）.
A. They were celebrating a festival.
B. They were doing experiments.
C. They were working in the factory.
D. They were idling in the street.

[单项选择]—What were you doing when I called you yesterday afternoon
—I（　）my homework and I was starting to take a bath.
A. had just finished
B. was finished
C. have already finished
D. was going to finish

[单项选择]What were the crew of the submarine doing when the accidental happened
A. On the way to visit another country.
B. On the way to finish some task.
C. Doing some exercises.
D. Doing some experiment.

[单项选择]What were the nine children doing while Carolyn was baking cookies
A. They were sleeping.
B. They were running around.
C. They were coloring pictures.

[填空题]What happened when a mother and her daughter were sitting in their room ______ broke out.

[单项选择]—What were you up to when your parents came in
—I ______ for a while and ______ some reading.
A. was playing; was going to do
B. played; did
C. had played; was going to do
D. had played; did

[单项选择]

M: What were you doing at twelve last night
W: I was playing cards with my kids in the kitchen.
M: Do your kids always go to bed that late
W: Not on weekdays.
M: Wasn’t your husband with you then
W: He was away on business in New York. He will be back late this evening.
M: Anything unusual happened
W: The light suddenly went out while we were playing. We remained silent at the table for some moments. After a while, we all heard glass breaking somewhere on the floor above.
M: Do you mean a window
W: I’m not sure whether it was a window or a glass or something else.
M: Didn’t any one of you hear a cry or a fight Didn’t you even consider going up for a look
W: We were frightened at the beginning and then went to bed as it was quiet all around.

What does the man probably do（　）.
A. A teacher.
B. A policeman.
C. A postman.

[单项选择]

If we were asked exactly what we were doing a year ago, we should probably have to say that we could not remember. But if we had kept a book and had written on it an aceount(记录) of what we did each day, we should be able to give an answer to the question.
It is the same in history. Many things have been forgotten because we do not have any written account of them. Sometimes people did keep a record of the most important happenings in their country, but often it was destroyed by fire or in a war. Sometimes there was never written record at all because the people of that time and place did not know how to write. For example, we know a good deal about the people who lived in China 4000 years ago, because they could write and leave written records for those who lived after them. But we know almost nothing about the people who lived even 200 years ago in central Africa, because they had not learned to write.
Sometimes, of course, even if the people can not write, they
A. there was nothing worth Being written down at that time
B. the people there don’t pay attention to the importance of keeping a record
C. the written records were perhaps destroyed by a fire
D. the people there did not know how to write