level後的定語從句用什麼引導

program 是個名詞，後跟從句可能是定語從句，也可能是同位語從句，定語從句可以用 which或 that 引導，同位語從句就用that引導。 eg. This is the program that /which is intended for the poor. 定從 The program that they focus on helping the poor is under discussion. 同位語從句