1.He became a part of the club last Wednesday.
He _______ the club last Wednesday.
2.The old man reached the top of the mountain at last.
________ the old man reached the top of the mountain.
3.They reached Beijing yesterday afternoon .
They _________ _________ Beijing yesterday afternoon .
4.Jim spent one hour doing his homework last night.
It ________ Jim one hour __________ _________ his homework last night.