--The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?--________ my students have a try?

----I passed the college entrance examination.----Congratulations! You________.

Being constantly exposed to advertisements is annoying, but it ______ be pleasant sometimes.

Some people          feel sick when they read a book in a car or on a boat．

I want        a book for my granddaughter Linda who is 2 years old.