[单项选择]They required that all the necessary documents ______ to the president's office before the end of this month.
A. be handed
B. must be handed
C. should hand in
D. had been handed in

[单项选择]They required that all the necessary documents ______ to the president's office before the end of this month.
A. be handed
B. must be handed
C. should hand in
D. had been handed in

[单项选择]It was essential that all the necessary documents ______ to the president's office before the end of this month.
A. be handed in
B. must be handed in
C. should hand in
D. had been handed in

[单项选择]The headmaster required that all the teachers （）at the meeting.
A. present
B. must be present
C. be present
D. would be present

[单项选择]In the Unites States, it is required that all children______ school, public or private, for 12 years
A. must attend
B. need attend
C. should attend
D. ought to attend

[单项选择]The headmaster required that all the teachers ______ at the meeting.
A. present
B. must be present
C. be present
D. would be present

[单项选择]

It is hardly necessary for me to cite all the evidence of the depressing state of literacy. These figures from the Department of Education are sufficient: 27 million Americans cannot read at all, and a further 35 million read at a level that is less than sufficient to survive in our society.
But my own worry today is less that of the overwhelming problem of elemental literacy than it is of the slightly more luxurious problem of the decline in the skill even of the middle-class reader, of his unwillingness to afford those spaces of silence, those luxuries of domesticity and time and concentration, that surround the image of the classic act of reading. It has been suggested that almost 80 percent of America’s literate, educated teenagers can no longer read without an accompanying noise (music) in the background or a television screen flickering (闪烁) at the corner of their field of perception. We know very little about the brain and how it deals with simultaneous confl
A. rather bleak
B. fairly bright
C. very impressive
D. quite encouraging

[单项选择]The manager required that all the employees _______at the office before 9:00 in the morning.
A. will arrive
B. arrive
C. arrived
D. have arrived

[单项选择]The professor required that all the essays ______ ready by next Monday.
A. to be
B. be
C. being
D. are