11.   The case challenged a Virginia law requiring students to observe a minute of silence during class.

12.   Throughout the state, public school students now observe a mandatory minute of silence at the start of each day.

13.   A federal judge on Thursday declined to stop public schools in Virginia from requiring students to observe a minute of silence.

n. + observe >>共 371
scientist 2.40%
group 2.06%
reporter 1.95%
troop 1.95%
researcher 1.95%
monitor 1.83%
correspondent 1.60%
force 1.60%
student 1.49%
astronomer 1.37%
student + v. >>共 919
be 10.57%
say 4.47%
have 3.98%
take 2.79%
learn 2.10%
get 1.44%
go 1.25%
do 1.10%
come 1.02%
use 1.02%
observe 0.07%
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