【简答题】There is an increasing number of college students in U.S. who are suffering from depression and anxiety.
【单选题】There is “u” and “s” in the word “us”.
【单选题】There is ______ “s” and ______ “u” in the word “bus”.
【单选题】There is ____ “u” and _____ “s” in ____ word “useful”.
【单选题】There is “h” and “u” in the word “huge”.