He telephoned the travel agency to ___ three air tickets to London.
—Why don’t we choose that road to save time? —The bridge to it __________.
The number of foreign students attending Chinese universities ________ rising steadily since1990.
-Why does the Lake smell terrible? -Because large quantities of water .
Daniel's family their holiday in Huangshan this time next week.
With the help of high technology, more and more new substances ______ in the past years.