－Mona works really hard.－I agree. she is ill she still goes to school.A. ThoughB. BeforeC

问题补充：

－Mona works really hard.

－I agree. she is ill, she still goes to school.

A. Though

B. Before

C. But

D. Until

答案：

(答案→)A. Though

B. Before

C. But

D. Until

解析：句意：--莫娜工作真的很努力。--我同意。虽然她生病了，但是她依然去上学。答语前后句为虽然……但是…….，在英语中二者不能同时出现，故选A