In front of our house _______ we used to swim.
We __________ the old scientist __________ his contribution ________ the country.
The reason __________ he refused to attend the meeting was that they didn't give him an invitation earlier.
The reason __________ he explained was __________ he was ill and unable to go to school.
Last week I bought a cellphone,__________ was very reasonable.
Many countries are now setting up national parks __________ animals and plants can be protected.