What will the mental health experts research next according to the passage? ( )

(单选题)The girl planned to have dance lessons at the training centr (单选题)The floor manager, as well as his managerial staff, ( ) t (单选题)Many fans were shocked when the team captain, John Turner, s (单选题)( ) with many teenagers, Zhou Dongyu who comes from the n (单选题)Luckily, Smith brought a map, ( ) we would have got lost. (单选题)The Rio Blue jacket comes with a special shaped pocket that (单选题)The ( ) of climbing to the top of the corporate ladder is (单选题)Fewer than ten accounting firms in the country have received (单选题)Before a problem can be solved, it must be obvious ( ) th (单选题)The vast number of new businesses the city is attracting is