1 . Meanwhile, the twins prepared the breakfast tray (托盘),_____________(add) a card they had made and walked out of the kitchen. (所给词的适当形式填空)

2 . We had to write a paper on how we plan to _______ what we would learn in class to our future professions and, eventually, to our lives.

A．add

B．expose

C．apply

D．compare

3 . Please________ the numbers and I’m sure they will________ more than 1000.

A．add up; add

B．add up; add up

C．add up; add up to

D．add; add up to

4 . It is essential that students not be________to their classroom and________their knowledge to social life.

A．limited, apply

B．limit, lead

C．limits, add

D．limiting, use