In 1948, three American scientists invented ____ transistor, which is ____ small electronic device to control an electric current.
A.the; a | B.a; a | C.the; the | D.a; the |
Sam always pronounces my name wrong. Do you think he does it____ ?
A.on purpose | B.at present |
C.at an end | D.right away |
My father told me that he had___ hard life in his childhood.
A.calmed down | B.gone through |
C.added up | D.set down |
Dennis___the warning and put his hand into the lion’s cage.
A.accepted | B.decided |
C.ignored | D.concerned |
___your score and you will make sure if you have passed the exam.
A.Add up to | B.Add to |
C.Add up | D.Add |
—I’ll do the washing-up. Jack, would you please do the floors?
—______.
A.Yes, please | B.No, I don’t |
C.Yes, sure | D.No, not at all |