[单项选择]What have the people probably been doing
A. Having a picnic.
B. Enjoying a concert.
C. Watching a picnic.
D. Eating out.

[单项选择]
What have the people probably been doing
A. Having a picnic.
B. Enjoying a concert.
C. Watching a picnic.
D. Eating out.

[填空题]What have Edmond Brothers been
They have been ______.

[多项选择] What have been the most memorable experiences of your career

[填空题]What have you been doing (late) ______

[简答题]{{B}}What have been the most memorable experiences of your career {{/B}}

[填空题]

Conversation 1

What refreshments have been prepared outside for the guestsSome chocolates, ______.

[填空题]What refreshments have been prepared outside for the guests Some chocolates, ______________________________________________.

[单项选择]What was said to have been stolen
A. A book.
B. $3,000.
C. A handbag.
D. A Christmas card.

[单项选择]What have the students been assigned to do before Monday（）
A. To read the textbook.
B. To see a movie and write a comment.
C. To write a composition.
D. To read a novel.

[单项选择] For about three centuries we have been doing science, trying science out, using science for the construction of what we call modern civilization. Every dispensable item of contemporary technology, from canal locks to dial telephones to penicillin, was pieced together from the analysis of data provided by one or another series of scientific experiments. Three hundred years seems a long time for testing a new approach to human interliving, long enough to settle back for critical appraisal of the scientific method, maybe even long enough to vote on whether to go on with it or not. There is an argument. Voices have been raised in protest since the beginning, rising in pitch and violence in the nineteenth century during the early stages of the industrial revolution, summoning urgent crowds into the streets any day these days on the issue of nuclear energy. Give it back, say some of the voices, it doesn’’t really work, we’’ve tried it and it doesn’’t work, go back three hundred years
A. the exposure of DNA to the public is unnecessary
B. the tiny cell in DNA is a neat little machine
C. man knows nothing about DNA
D. man has much to learn about DNA