18.He injured his leg and ______ couldn’t play in the game.
The student _________ forward to going abroad for further study.
Some of this heat near the earth’s surface _________ make electricity.
The oceans and seas _________ the islands are deep blue and many cities lie _________ a bay.
We can see lots of small islands _________ the shore.
.I just wonder that you don’t want to cooperate with me.