About _______ of the surface of the earth _______ covered with water.
.Going on a trip to a far-away destination _________ be expensive and difficult, but it is very interesting.
.We are _________ that she should be admitted into our club.
.The man insisted _________ a taxi for me even though I told him I lived nearby.
.The manager demanded the meeting _________.
.We have moved to live in the countryside, because we get tired _________ the city life. ^*