Decide which of the choices given below would correctly complete the passage if inserted in the corresponding blanks. Mark the correct choice for each blank.

When it is desirable to express a magnitude of current ___1___than the ampere, the milliampere (mA)and the microampere(μA) units are used. One milliampere is equivalent ___2___one-thousandth (0.001 )of an ampere, and one microampere is equivalent to one-millionth (0.000 001) of an ampere.                                     
The term ___3___ (represented by the ___4___symbol U) is commonly___5___ to indicate both a difference in potential and an electromotive force. The unit in ___6___voltage is measured is the___7___.One volt is ___8___as that magnitud eof electromotive force required cause a current of one ampere to ___9___ a conductor ___10___a resistance of one ohm.
1.a. small     b. big      c.smaller       d. small
2.a.with      b. of       c. about        d. to
3. a.voltage   b. current    c. power       d. resistance
4.a.value     b.letter      c. way         d. character
5.a.use       b. using     c.usage        d.used
6. a. whom   b.which      c. what        d. that
7.a.ohm      b. watt      c. meter        d. volt
8.a.define    b.defined     c. to define     d. being defined
9. a. pass by  b. pass over   c. pass through  d. pass away
10.a. have    b. had       c.having        d. having had
Key: 1. c  2.d  3.a  4.b  5. d  6.b  7.d  8.b  9.c  10. c