单项选择题

Inside the classroom, some learners seem to take advantage of what’s going on (31) others. It looks as if they are more (32) with the process of learning than their classmates. Teachers are aware of this too. They will (33) say that successful students possess some of all of the following characteristics.
A willingness to listen: good learners listen to what’s going on-not just in the sense of paying attention, but also in terms of really listening to the English that is being used, (34) it (35) with eagerness and intelligence.
A willingness to experiment: many good learners are not afraid to " have a (n) (36) " They are prepared to take risks, to try things out and see how it works. (37) , not all successful language learners are (38) , but the (39) to use the language is an important one.
A willingness to ask questions: (40) some teachers can become irritated by students who (41) difficult questions, the urge to find out why is part of a successful learner’s (42) Good teachers frequently (43) students to ask if they don’t understand something. Good learners do this, judging when it is (44) to do so and when it is not.
A willingness to accept correction, good learners are prepared to be corrected if it helps them. They are keen to get feedback from the teacher and (45) what they are told. But this only (46) where teachers are able to offer constructive criticism (47) castigating them for being wrong. Giving feedback involves praising students for things they do well, and offering them the ability to do things better (48) they were less successful. It (49) teachers in judging their students’ responses to correcting so that they can act (50) .

A.which
B.what
C.when
D.where