With housing prices ______ sharply, many people have no idea whether they should buy an apartment or not．

Varieties of household goods are sold here, ____from babies’ toys to old men’s walking sticks. 

.Mary couldn’t make herself _______ attention to because her classmates made so much noise.

 They considered ______ a computer, which was considered ________ a great help in their work.

Since then, more than 2 billion apps have been downloaded at prices ________ free to $900.