用所给词的适当形式填空。Smoking a lot is________(harm)to your health.You’d better give it up.
---My son isn’t good at math. Could you please give him ? --- Sure.
Ann is a girl,she can climb that tall tree.
---does your sister go skateboarding? --- Every day.
---What’smatter with you ? ---I have a cold. I want to go tobed early.
More than twenty students in my class are good at playing basketball.