21.   Scientists found elements of magnesium, silicon and aluminum.

v. + element >>共 487
have 9.53%
add 5.08%
combine 4.45%
contain 4.21%
include 4.04%
incorporate 3.58%
use 2.19%
bring 1.96%
introduce 1.79%
involve 1.67%
find 1.21%
find + n. >>共 1111
way 10.77%
body 4.59%
evidence 3.12%
job 2.32%
work 1.71%
solution 1.51%
place 1.01%
buyer 0.83%
bomb 0.72%
home 0.69%
element 0.04%
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