[see also: clear, obvious, plain]
From this previous work, it was not at all evident that there would be some covering or non-covering properties which would be preserved by one of these kinds of extensions.
The description of $Q$ makes it evident that (3) holds. [Note that the it is necessary here.]
Go to the list of words starting with: a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
y
z