There are some health problems that, when ________ in time, can become bigger ones later on.
Animals are obviously ________ lower form of life than ________ man.
-I’m leaving for Europe on vacation tomorrow. -________.
----What’s the matter with Della? ---- Well, her parents wouldn’t allow her to go to the party, but she still ____.
---- Here____! Where is Xiao Liu? ---- There____.
While I was in the foreign country, my younger brother always ____ me of what was happening in big cities in time.