— My colleague felt quite happy because his solution was closer now to ______．
— Congratulations!

---You may find the key to the maths problem on page 107.
---Ah, it’s so simple. I wonder why I ________ of that.

They _____ friends since they met in Shanghai.

Lin Yi isn’t what it used to be．The last decade ______ great changes in the city images．

The two old sisters,        so long, held each other and burst into tears．

—Andy works hard．
—So he does．He is often seen _____ heavily before his teammates have even arrived at practice．

----I don’t suppose the police know who did it.
----Well, surprisingly they do. A man has been arrested and _____ now.

Internet, as well as telephones, ____ an important part in daily communication. 

---Where___?
—I got caught in the heavy traffic, or I ___ here earlier.                                        

—You speak very good French!                                                                 
—Thanks. I ______ French in Sichuan University for four years.