If you really want to make the most of your English lessons, it's your responsiblity to learn as many words as you can in your own time. If your average lesson is made up of different people continually asking, "how do say ..... in English?" then you are losing valuable time that could be spent making conversation - real communication.
Don't treat your teacher as a walking dictionary. As I've said before, you should be learning word groups that are important to you so that you have something relevant to say in class.
You can do this by making mind-maps
or by using flash cards to memorise key words and expressions.
Don't expect your teacher to know what words are important to you. If you are serious about your language learning, take the responsibility of building your own vocabulary and then your teacher will have time to work on your pronunciation and sentence structure, as well as the all-important fluency.