___(be)the boy ___(ride) a bike with his brother now?

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___(be)theboy___(ride)abikewithhisbrothernow?___(be)theboy___(ride)abikewithhisbrothernow?___(be)the

___(be)the boy ___(ride) a bike with his brother now?
___(be)the boy ___(ride) a bike with his brother now?

___(be)the boy ___(ride) a bike with his brother now?
Is , riding

【Is】 the boy 【riding】 a bike with his brother now?
考的是现在进行时,由now 可知。