—Shall I attend my friend's comingofage ceremony, Mum?—No, unless you see to ________ that you will be home before 10:00 P.M.
Put the_______of your tongueagainst your upper teeth when you produce the sound。
At the meeting they discussed three dif-ferent_______to the study of mathematics。
T0 make members 0f a team performbetter,the trainer first of all has to know their_______and weaknesses。
When Jane began to take swimminglessons,her main_______was the fear of water。
Finding information in today’s world is easy.The_______is how you can tell if the information you get is useful or not。