－My little brother was really_______ at the _______ news.

---Can __________ work out the problem?---__________, I think. It is too hard.

You will not be allowed to get into the plane_______ you pass security checks(安检).

I used to ___________ in the country. But now I am used to ___________ in the city. 

---Most of us are looking forward to the _____________ trip to Nanjing .--- I agree with you.