It is an unfair thing for our students____ have devoted 12 years to preparing the exam to be beaten by those_____ use illegal methods..
It______ a calm head to find the best solution to such a difficult problem within a short time.
By the end of 2007,about half a million people had flooded into the city,______ up around 10 percent of its total population.
Jumping out of ______ airplane at ten thousand feet is quite ______ exciting experience.
_____ on the MSN,some people often use “88” for “goodbye”.
At the meeting they discussed three different ______ to the study of mathematics.