My father made me a promise ___ he would buy me a present if I got a good mark

Deng Yaping was born _____ February 6th, 1973. [ ]

Where is Jack?.—–He______ be in the reading room .I saw him just now.

Is that colourful pencil-box Bob’s ? – No, it isn’t __________. It’s _________,

While listening in class, you should concentrate_____ your teacher. [ ]