1) Who exactly were you referring when you talked about upper class people?
CORRECT! REFER TO SB/STH
2) He congratulated her passing her exam.
CORRECT! CONGRATULATE SB ON STH
3) Iron is typically extracted iron ore through a process known as smelting.
CORRECT! EXTRACT STH FROM STH
4) He was accused money laundering in 2008.
CORRECT! ACCUSE SB OF STH STH
5) They've been waiting the train for half an hour.
CORRECT! WAIT FOR SB/STH
6) Has Marvin replied your letter yet?
CORRECT! REPLY TO SB/STH
7) Part of the A64 has been closed after a lorry collided a bridge.
CORRECT! COLLIDE WITH SB/STH
8) She thanked Richard the present he'd bought for her.
CORRECT! THANK SB FOR STH
9) Everybody stared his strange clothes in amazement.
CORRECT! STARE AT SB/STH
10) Her father is worried her poor education.
CORRECT! WORRY ABOUT SB/STH