A means the same thing as the English words under the Chinese definition
B means it usually sleeps for 15 minutes at night
C he goes to bed at 10:15 at night
D means he usually goes to be at 10:15 at night
Both changed and started, the two verbs in this sentence, are regular verbs. regular verbs are verbs whose past tense is simply formed by adding -ed to the end of the word. so change is changed, and start is started. hope this helps (-:
