求教新東方語法第三回第四回

sunnylady

1.（第三回，28）Heat is transformed in any of the three ways , either of conduction , convection or radiation.

答案是of 錯，請問要怎麼改

2.（第三回，34）Almost every parents in the 1950s knew of Dr. B Spock , a New York Pediatrician, whose ‘Baby and Child Care’ book become the second best selling book in American history.

答案是every 錯，請問要怎麼改，是改each嘛？那each 和every 要怎麼用呢？

3.（第三回，35）The sun has yellow-gold rays because we are reviewing it through the earth’s atmosphere but judging from its surface temperature, the sun’s rays are probably closer to white.

答案是it，請問要怎麼改？

4.（第四回，39）White blood cells only make up about 1 percent of blood, but their small number belies their immense important in playing a vital role in the body’s immune system.

答案是important ,請問belies應該接單數才對，為啥their small number是單數？