________ hard one may work, one cannot master a foreign language in a month or two.
_______ his arrival at the airport , the film star was recognized and soon surrounded by a group of film stars.
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.