When a space shuttle has accomplished its _____, it can be ready for another trip in about two weeks.
I don’t like such a person____often lies before your face.
.By using ear sonecan tell the direction____a sound comes.
I don’t believe the reason____he has given for not coming to the lecture.
In the forest we observed some trees____the leaves were black with disease.
I often think of the years ____ I worked with the foreigners, ____ has had a great effectonmylaterlife.