The question is ______ is responsible for what has happened. A what B where C who D whose
_______ successful docking of Shenzhou VIII with Tiangong-I means that China has managed to take ________ first important step to establish its own space station.
--Could I speak to Mr Brown? -- ______ , I'1l go and see if he is in.
The twins look the same. Mr Li find ______ hard to tell one from the other. A it B them C her D that
--Can I speak to Mr Wang? --Sorry, he' s out. Can I _____ a message?
--Have you _____ the invitation to the party? --Yes, I have. And I've ______ it.