25. After many years’ tough talks, Vietnam became the 150th member ________ the WTO last year.
---What’s made Ruth so upset? --- ______ three tickets to the folk music concert.
"Don't forget to come to my birthday party tomorrow." "__________."
There isn’t such a word ______ I know.
You can choose _____ book you like among these.
______ she said this, she regretted it.