People who have studied ancient instruments are hoping to learn more about the culture that ______ this ancient flute.
A．produce B．produced C．is producing D．was produced
Because natural disasters occur at random times, it is difficult to warn people _______.
A．at present B．at last C．on time D．in advance
— I would never go to that supermarket again. The quality of the goods there is too poor.
— _______.
A．Nor am I B．Neither would I C．So do I D．The same with me
Many road accidents occur because drivers cannot ______ the speed of approaching vehicles.
A．conclude B．count C．measure D．value
—Betty told me the last mountainous bike you preferred to yesterday was bought by John.
—Oh, my! How I regret that I didn’t buy ______.
A．that B．such C．one D．it
Things go back to ______ since we paid off all our debts.
A．formal B．regular C．common D．normal
