— Where is my pen ? Have you seen ____?
— Oh, sorry. I have taken ____ by mistake.
A．it; yours B．them; his C．it; mine D．them; hers
We are from China and we _______ Chinese.
A．say B．talk C．speak D．tell
Some students are so ______ that they often make mistakes in their homework.
A．carful B．serious C．careless D．successful
__ we are young, we can still do something to help protect the environment.
A．If B．Since C．Because D．Though
--- Jimmy, don’t put this pair of trousers on the sofa.
--- Sorry, mum. I will _____________ right now.
A．take it away B．take them away
C．knock it off D．knock them off
---You were out when I went to your house this morning.
---Oh, I _______ for a friend from England at the airport.
A．was waiting B．waited
C．am waiting D．have waited
