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1.The baby can't even walk, ___ run.
A.as well as
B.still less
C.no less than
D.still more
2.Even if ___, I won't go.
A.invited
B.being invited
C.having been invited
D.being known
3.Does the thin mountain air agree ___ you?
A.to
B.with
C.on
D.for
4.Ultrasnoic sounds produce pulsed signals ___ various defects in metal can be detected.
A.for which
B.of which
C.as a result of which
D.by means of which
5.___, it is quite easy to drill a hole in it with laser.
A.Hard although a diamond is
B.As a diamond is hard
C.Hard as a diamond is
D.How hard is a diamond
