单项选择题
（）troublesome the problem is， he faces it with patience.
A.No matter B.Although C.Despite D.However
单项选择题 （）formaloccasions，youshouldtalkaboutsomeworldissuesorsocialproblems，notaboutyourselforyourfamily.
单项选择题 Onlyafterthestudentshavemasteredtherulesofpronunciation（）.
单项选择题 Whynot（）toProfessorSmithforadvice？Heisanexpertinthisfield.
