Vocabulary
posted by Anonymous .
Wheels on this type of vehicle can retract
a. a bicycle
b. a station wagon
c. an airplane
d. a sailboat
I feel like I should know the answer to this, but I'm not sure. It can't be a bicycle or a station wagon. So would it be an airplane or a sailboat?

Vocabulary 
Ms. Sue
Learning the definition of retract will help you find the right answer.
http://dictionary.reference.com/browse/retract 
Vocabulary 
Anonymous
A sailboat?

Vocabulary 
Ms. Sue
I've never seen wheels on a sailboat.

Vocabulary 
Anonymous
An airplane?

Vocabulary 
Ms. Sue
Right, after a plane gets off the ground, the wheels retract.
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