[单项选择]According to news reports, US restaurants are partly to blame for the growing bellies. Awaiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government, according to a USA Today story. Americans traditionally associate quantity with value and most restaurants try to give them that. They prefer to have customers complain about too much food rather than too little.
Barbara Roils, a nutrition professor at Pennsylvania State University, told USA Today that restaurant portion sizes began to grow in the 1970s, the same time that the American waistline began to expand.
The average waistline of Americans started to grow
A. two or three years ago.
B. in the 1970s.
C. about four years ago.
D. since last year.

[单项选择]According to news reports, US restaurants are partly to blame for the growing bellies. Awaiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government, according to a USA Today story. Americans traditionally associate quantity with value and most restaurants try to give them that. They prefer to have customers complain about too much food rather than too little.
Barbara Roils, a nutrition professor at Pennsylvania State University, told USA Today that restaurant portion sizes began to grow in the 1970s, the same time that the American waistline began to expand.
The average waistline of Americans started to grow
A. two or three years ago.
B. in the 1970s.
C. about four years ago.
D. since last year.

[单项选择]According to the news, US President Barack Obama made a solemn trip to Delaware Tuesday, to honor the troops killed in a helicopter crash in______.
A. Afghanistan
B. Iraq
C. Kosovo
D. Delaware

[填空题]News reports often focus on disputes among scientists over the validity of preliminary (untested) data, hypotheses, and models (which by definition are tentative). This aspect of science-　1　because it has not been widely　2　and accepted-is called frontier science. The media　3　to focus on frontier science because its so-called "breakthroughs" make good news stories. Just because something is in the　4　of frontier science,　5　, does not mean that it isn’’t worthy of serious consideration;　6　, such matters need further study to determine their　7　. 　　　8　contrast, consensus science consists of data, models, theories, and laws that are widely accepted. This aspect of science is very reliable but is　9　considered newsworthy. The trouble is that the word science is used to　10　both frontier and consensus science, without　11　The media preference　12　frontier science gives the public the　13　impression that frontier science　14　very certain conclusions, which may or may not be correct. 　　However,　15　s
A. A． rather
B． otherwise
C． anyway
D． therefore