—You've made great progress in your studies of English, haven't you?—Yes, but much________to be done.
---I’m going out tonight.---Well, I’d rather you ______.
Bitten twice, the postman refused to ______ our letters unless we changed our dog.
______ to go abroad alone is what worries me most.
When I said someone was stupid, I didn’t ______ you.
Those who are not ______ with the progress they have made will have greater success.