Mr. Smith gradually _____ a knowledge of the subject.
| A．attained | B．achieved | C．required | D．acquired |
I firmly believe, as long as Igreat efforts, my dream will come true sooner or later.
| A．spend | B．spare | C．share | D．make |
Peter will give me five sweets an apple, but in fact I don’t have a sweet tooth.
| A．in search of | B．in need of | C．in case of | D．in exchange for |
— The traffic is too heavy. Would you like me to help you the street?
— That’s very kind of you.
| A．beside | B．across | C．opposite | D．over |
Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.
| A．carried on | B．carried out | C．carried away | D．carried off |
Putting in a new window will ______ cutting away part of the roof.
| A．contain | B．comprise | C．include | D．involve |