A.statistics
B.atmosphere
C.concentration
D.supplement
The atmosphere certain gases mixed together in definite proportions.
A: consists of
B; is made up
C; composes of
A、gaze
B、gazing
C、be gazed
D、being gazed
A.Tornado
B.Thunderstorm
C.Storm
D.Turbulence
A、surround
B、surrounded
C、surrounding
D、surrounds
A、met
B、heard
C、witnessed (见证)
A.do
B.has
C.is
D.are