His successful experience on calculating the distance _______ an interesting topic to discuss.
A raised B rose C was raised D was risen
A. 此题考察动词 raise与rise的辨析。
raise 为及物动词，意为“举起……；引起”；rise为不及物动词，意为 “升起”
及物动词后面需要宾语；不及物动词后面不能加宾语，所以及物动词有被动语态；不及物动词没有被动语态。
如：The students are raising the national flag. The sun rises in the east.
根据题干， “an interesting topic to discuss”为本句的宾语，且本句没有表达被动含义，raise在此句中意为“引起”，故选A.
Liu Xiang ________by his coach to train regularly．
A．advised 
B．advises C．was advised D．be advised