[ ]A. in B. on
C. under2.—Where is Xiaoyong?
—__________
[ ]A.He's on the box
B. He is on the bed.3. —What is this?
— __________.[ ]
A. It's on the box.
B. It's a box.4.He is swimming __________ the lake. 
[ ]A. on
B. in
C. under5. —__________?
—It's on the chair.[ ]A.What is it
B.Where is the apple
C.How is the apple6. She often__________ in the park. 
[ ]A. flies kites
B. swims
C. walks1. B 2. A 3. B 4. B 5. B 6. A