Quiz: fill in the blank:

Tomorrow we have to ___ to school.

was going, is going, goes, has gone, have gone, went, gone, go, going

• Aeronomy is the study of the Earth's upper atmosphere, which includes their composition, temperature, density and chemical reactions.
• Atlanta, Georgia, is a hub of air and train transport, as well the leading symbol of the new South.
• Throughout the 1960s, Martin Luther King fought nonviolently for African-American right and for justice for all Americans.
• Many international corporations have exploited the natural resources of countries in third world.
• Agricultural scientists at the University of California have recently made a number of discoveries that could help themselves receive upcoming governmental grants.
• Daily ingestion of large quantities of Vitamin E might help people substantially lengthen the lives.
• Where does a river intersects another river, a city usually is formed.
• Reptiles must always to avoid extremes of temperature if they are to maintain appropriate body heat.
• Even if a member has drank too much the night before, the counselors of Alcoholic Anonymous will try to convince him or her to sober up and stop drinking again.
• I need some rest, I will go to home.
• The differential attractions of the sun and the moon have a direct effect in the rising and falling of the tides.
• A massive rural exodus has been taken place throughout the world during the course of the twentieth century.
• With special enzymes that are call restriction enzymes, it is possible to split off segments of DNA from the donor organism.
• Before she died, Andrew Jackson's daughter, who lives in the family mansion, used to take tourists through her home.
• An orangutan is similar to a human because has a nearly identical DNA pattern.
• The value of dollar declines as the rate of inflation raises.
• If biennials were planted this year, they will likely to bloom next year.
• The way in which Ice Ages occur remains a puzzling, for recent meteorological records can tell us little about the process.
• A complex amount of linguistic information can be procured from a largest collegiate dictionary.
• Virtually all philosophers agree the beauty cannot be defined in an objective way.