—I drove to Zhuhai for the air show last week.
—Is that ________ you had a few days off?
A．why B．when C．that D．where
It is generally considered unwise to give a child ________ he or she wants.
A．however B．whatever C．whichever D．whenever
________ made the school proud was ________ more than 90% of the students had been admitted to key universities.
A．What；because B．What；that
C．That；what D．That；because
—You can't imagine ________ fantastic fun online chatting is.
—Really？But it may cause a lot of trouble sometimes.
A．what B．how C．why D．so
It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.
A． that B．when C．what D．how
A plan has been put forward ________ more graduates should go to work in the country.
A．when B．that C．whether D．how
