In reality ,not only an enormous amount of strength and fitness but also determination __________ required to perform these activities that __________ seem childish and cause laughter rather than respect．

1. A.
   are; could
2. B.
   are; can
3. C.
   is; must
4. D.
   is; might

In reality, Lincoln’s career was _________ full of almost constant failures until he reached the White House．

1. A.
   what
2. B.
   that
3. C.
   one
4. D.
   it

 In reality ,not only an enormous amount of strength and fitness but also determination ____ required to perform these activities that_  _seem childish and cause laughter rather than respect.

  A．are；could         B．are ;can       C．is; must        D．is; might