It can be easy to _______ such bad habits as smoking and heavy drinking, but it is not so easy to quit.
You may borrow this book ________ you promise to give it back.
I have been keeping that photo ________ I can see it every day, as it always reminds me of my college days.
Doing your homework is a sure way to improve your test scores, and this is especially true ________ it comes to classroom tests.
The roof fell ________ he had time to dash into the house to save his baby.
Tom make up his mind to get a seat for the football match ________ it means standing in a queue all night.