Chia động từ: When he (sit)_ on the bus to school he suddenly (realize)_ that he ( not look)___ the front door

When he (sit)___ on the bus to school, he suddenly (realize)___ that he ( not look)___ the front door

Chia động từ: When he (sit)___ on the bus to school he suddenly (realize)___ that he ( not look)___ the front door