根据回答写问句。
1. A: ?
B: John is 50 kg.
2. A: ?
B: I am 155 cm.
3. A: ?
B: My legs are 76 cm long.
4. A ?
B: Sarah is 15 years old.
5. A: ?
B: I wear size 16.
1. How heavy is John?
2. How tall are you?
3. How long are your legs?
4. How old is Sarah?
5. What size do you wear?