Public service ads，also PSAs，often _________ for free，_________ to educate people about health，safety or any other problem that affects public welfare.
A． run；meant B． are run；are meant
C． are run；mean D． run；are meant
At the ancient Olympics，all men，________ had to compete wearing no clothes；while single women took part in their own separate competition，a festival _________Hera，the wife of Zeus.
A． in tradition；in favor of
B． by principle；in celebration of
C． by tradition；in honor of
D． in order；in memory of
--- Why do you think ________ the Eagles went home，angry and bitter？
---_________ they didn’t win the tournament andbecause what mattered to them was victory.
A． was it that；That B． that；For
C． it was that；Because D． that；Because
The small boat was almost sunk by the dinosaurs which suddenly ________ to the surface，fighting each other，but fortunately the three men ________ get away.
A． rose；could
B． rose；were able to
C． arose；could have been able to
D． raised；could have
_______the virtual world of Real Cine， the headsets even have small openings _______ smells to match the environment.
A． Adding to； give out B． Added to； give off
C． To be added to； giving off D． To add to； giving out
______ that after the ash covered the people who failed to flee the city， their bodies nearly completely______ and disappeared，_________ empty spaces in the ash.
A． It turned out ；broke down； leaving
B． As turned out； broke up； which left
C． It turned out； broke off； leaving
D． What was turned out was ；broke down； left
