I have been convinced that the print media are usually more __________ and more reliable than television.
______ the students in our class is 50 and _______ them study very hard.
She searched all the places where she _____ have left her necklace but it was all in vain.
---- Why don’t you try to do exercise to lose weight? ---- I have tried everything but it has made no _____________.
Some problems ___ in the lecture by Mr.Smith are very popular in our school, such as the waste of electricity, water and food, etc...
His report was so exciting that it was interrupted by applause(鼓掌).