You’d better()your course to port to avoid collision.
A、to alter
B、alter
C、altering
D、altered
A、to alter
B、alter
C、altering
D、altered
A、I haven‘t been getting much sleep either. B、You‘d better not push yourself too hard, or you‘ll get sick. C、I‘m sorry. I shouldn‘t have blown up like that. D、You‘d better do exercises regularly.