You will have no difficulty ____ the problem if you ______ it.
Davy ________ his homework at home yesterday.
All the fruit is free. You can eat ________.
Mom, could you buy me a new jacket? This one can’t ________ the cold.
If you don’t know ________ the new robot toy, you’d better read the instructions first.
---________ will your head teacher return from the USA?---In two days.