-–What do you think of the lecture?--____but interesting, but I’ve managed to survive it.

The role change from husband to father, although difficult, doesn’t seem so great as _____    from wife to mother.

----Which do you prefer, noodles or dumplings? ----_________, thanks. I'd like some rice.

I knocked on the door but ______ answered.

---What’s the matter with your boyfriend?---I can’t stand _____when he often ignores me and talks with other girls.