1、last①持續(xù)、繼續(xù)…,如：
The flowers show lasted a week.花展持續(xù)了一周.
②支持、保持、耐久,如：
How long will this battery last?
2、keep ①保持、保留(存),如：
He may keep the book until you come back.
②保有
You can keep it if you like it.
③飼養(yǎng)(動物)、撫養(yǎng)(家屬)、雇傭(仆人)、收留(住宿者),如：
She has kept the cat these ten years.
3、continue①(continue是不間斷的繼續(xù),而last 是中斷、間斷時又繼續(xù),如：
This road continued for miles.
②The rain continued three days.
這道題的題意是晚間新聞只有半個小時的播出時間 所以選D