— When is Henry's birthday party, Lynn?— The 18th, __________about three o'clock in the afternoon.
—Don’t be late for school next time, ______? —______.
He always gives me useful advice when I don’t know _____.
Mike has much difficulty ________ Chinese so he often asks me ________ help.
As a policeman , you must yourself and your work.
I decided not to wait any longer ______ I waited for him at the station for two hours.