17.
A. There are other men available apart David for the woman.
B. There are other meaningful things except dating with David.
C. There are opportunities to develop her relationship with David.
D. There are many friends to support her and her relationship.

18.
A. He heard someone break the glass.
B. He didn't know the juice was in the kitchen.
C. He met a car accident this morning.
D. He carelessly broke the container of the juice.

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