Edison failed _____ times before he succeeded in producing the first electric lamp.

A) adopt B) adjust C) adapt D) affect

A) ought to B) should C) would D) must

A) as well B) just as well C) well D) may as well

A) busy B) disappointed C) ashamed D) deprived

A) permanent B) dramatic C) powerful D) imaginary

A) manage B) arrange C) order D) organise

A) delicate B) feeble C) sensible D) feasible

A) advice B) signal C) label D) notice

A) acceptable B) admission C) advanced D) entrance

A) paid in B) paid off C) paid over D) paid down