1 . Originally intended to be completed 5 years ago, this shopping mall fell far behind s________.(根据首字母单词拼写)

2 . Because of the tight________ and heavy workload of Grade 12, many students have to make use of their lunch break to finish homework.

A．schedule

B．investigation

C．performance

D．impression

3 . The World Health Organization gave a warning to the public without any ______when the virus of H1N1 hit Mexico in April, 2009.

A．delay

B．effort

C．schedule

D．consideration