Work hard, ________ you’ll fail in the English exam this time.
— Our monitor Jack is good at all the subjects, but he never___________ .— What a modest student!
—Would you like a cup of coffee or a bottle of juice?—______. I’d like some milk.
The doctor has devoted most of his time to ___________ the patients.
As a student, I can’t afford ___________ a new mobile phone.
If we don’t study hard, we will___________ in our class.