The first textbooks ______ for teaching English as a foreign language came out in the 16th             century. 
#95342
A
to be written
B
written
C
being written
D
having written
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He is very angry because the bag _____ on the net a month ago hasn't arrived yet.
#93858
A
being ordered
B
ordering
C
ordered
D
to be ordered
The disco music,digitally________in the studio,sounded fantastic at the party that night.
#88474
A
recorded
B
recording
C
to be recorded
D
having recorded