The workers were made _____ the whole day.
—? —They are reading books. A、What do they do B、What did they do C、What are they doing
His job is funkind of dangerous. A、but B、or C、and
---I haven't seen Jack for three days. Is he ill? ---_______. His mother told me that he was in hospital.
--- How _______ is it from Xi'an to Dunhuang? --- It's less than 3 _______ flight.
--- When did your parents _______? --- They _______ for 20 years.