A.way
B.curtain
C.ventilating
D.warrant
E.obligated
F.quantify
G.innovative
H.foundation
I.sheathing
J.context
K.vibrating
L.visual
M.persevere
N.spatial
O.dictated

A．She has to catch the train.
B．She has to catch the bus.
C．She has to go to work.
D．She is tired.