There is ________“s” and ________“f”in the word “useful” .
--- I’m sure I will get good marks in the final exam.--- I believe your parents will ______ your study if you try your best.
This morning I tried on some coats in the shop, but _____ of them looked good.
The boy looks nice ____ white and the red sweater looks good ______the girl .
I’d rather ________ than _________
We should spend as much time as we can ______ English.