The development of industry has been _____ gradual process throughout _____ human existence, from stone tools to modern technology.
| A．/; the |
| B．the; a |
| C．a; / |
| D．a; a |
— I don’t remember having ever seen John since last week. Has he gone somewhere?
— Not really. He ______ his newly-bought apartment.
| A．has decorated | B．decorated |
| C．has been decorating | D．was decorating |
Being popular with children, these toys ______ well and _____ in two days.
| A．sell; sell out | B．are sold; are sold out |
| C．are sold; will be sold out | D．sell; will be sold out |
Be ______ — you can’t expect me to finish all this work in so little time.
| A．confident | B．reasonable | C．creative | D．grateful |
_______ the fact that his original experiments had failed, Pro. White stuck to his research.
| A．In spite of | B．Because of | C．As to | D．In views of |
Scientists suggested parents _______ children do the housework to make money.
| A．made | B．make | C．to make | D．had made |