—Where is our English teacher?
—She is in the classroom, _____ the exercises _________ the students have done at home.
| A．explaining; / | B．explaining; for |
| C．explained; to | D．explained; from[ |
China and the United States held their first strategic dialogue on August 1 and _______ to increase co-operation and constructive relations.
| A．agreed | B．would agree | C．have agreed | D．had agreed |
It’s reported that a plane with five people _______ crashed into the mountain several days ago.
| A．on board | B．on the board | C．in board | D．in the board |
--Why are your group so happy?
--Our group _______ theirs in the oral English competition.
| A．has won | B．have gained | C．has beaten | D．have defeated |
______ to somebody, a British person often shakes hands with the stranger.
| A．Introducing | B．To introduce | C．To be introduced | D．On being introduced |
It was the hurricane ______ was called Katrina ______ destroyed the city of New Orleans.
| A．which; that | B．what; which | C．which; who | D．that; which |