Unless astronomers ______ their search for extraterrestrial life to stars as exceptional as the Sun, they are wasting much of their time.

After the students were shot by the military during a d...

单项选择题After the students were shot by the military during a demonstration against the army ______, the girl students dared for the first time to stay out at night on the streets to picket.

They eat a lot of meats and dairy foods, along with a l...

单项选择题They eat a lot of meats and dairy foods, along with a lot of ______ items that don't fall into any Nutrigroup, such as sugar, fat, and condiments.