问题补充：
The teacher asked the students.
A. if they are interested in dinosaurs
B. when was Audery Heben born
C. What they will do with the computers
D. how many trees they had planted
答案：
A. if they are interested in dinosaurs
B. when was Audery Heben born
C. What they will do with the computers
(答案→)D. how many trees they had planted
解析：在复合句中用作宾语的从句叫宾语从句。1．语序无论主句是陈述句还是疑问句，宾语从句都必须使用陈述语序，即“主句＋连词＋宾语从句（主语＋谓语＋……）”句式。2.时态：1·主句用一般现在时，从句可用任意时。2·主句用过去时，从句用过去某个时态。3·主句用过去时，从句是客观真理时，用一般现在时态。3.连接词，分连接副词、连接代词、从属连词。连接词位于主句和从句之间。A项时态不正确，BC项语序不正确，D项语序时态连接词都正确，故选D.
