To improve their oral English, everyone in the class is supposed to ________ actively in these discussions.
Seeing me, Tom---- one of my old friend, walked across the street ______ to me, saying “Long time no see.”
.There has been rising demand for grain as _______ industrial material in spite of the nation’s good harvests.
.At the meeting they discussed different ______ to the study of mathematics.
The children were warned of not being too _______ about things you are not supposed to know.
.It was difficult to guess what her _____ to the news would be.