David likes vegetables, _________ tomatoes, potatoes and cabbages. 
#56099
A
of course
B
for example
C
and so on
D
such as
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       Tony       Frank likes three-D films. They think it is harmful for their eyes.
#56450
A
Neither, nor
B
Either, or
C
Both, and
D
Not only, but also
While she _____ TV, someone _______ at the door.
#55631
A
watch, knocked
B
was watching, knocked
C
watching, knocking
D
was watching, is knocking