请选择ABC0k*v*k4B8G/]*q2L)]+g(l9F:]5R'{We often do ______ in the science lab.5n/J9u3W;b._9j0L0d1?;{
A. experiments5n/J9u3W;b._9j0L0d1?;{
B. exercises5n/J9u3W;b._9j0L0d1?;{
C. listening5n/J9u3W;b._9j0L0d1?;{