Only when I 
left my parents for America ____ how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
Always remember put such dangerous things as knives out of children's
| A． | touch | B． | sight | C． | reach | D． | distance |
-How are your reccent trip to Sichuan?
-I've never hadone before.
| A． | a pleasant | B． | a more pleasant | C． | a trecst pleasant | D． | the most pleasant |
Simon made a big bamboo boxthe little sick bird till it would fly.
| A．keep | B．kept | C．keeping | D．to keep |
Our teachers always tell us to believes inwe do and who we are if we want to succeed.
| A．why | B．how | C．what | D．which |
Nick, it's good for you to read some books（）China before you start your trip there.
| A． | in | B． | for | C． | of | D． | on |