来自卢长友的问题
请解这题weallknowthat_____orangejuiceis____healthydrink.weallknowthat_____orangejuiceis____healthydrink.：A/;a请帮我解释一下第一空为什么不用冠词,第二空为什么a
请解这题weallknowthat_____orangejuiceis____healthydrink.
weallknowthat_____orangejuiceis____healthydrink.
：A/;a
请帮我解释一下第一空为什么不用冠词,第二空为什么a
