—I’m thinking of the test tomorrow. I’m afraid I can’t pass this time.—________!I’m sure you’ll make it.
When you read the book, you' d better make a mark _____ you have any questions.
We'd better hurry ______ it is getting dark.
I didn' t manage to do it _____ you had explained how.
_____ he comes, we won't be able to go.
I hurried _____ I wouldn't be late for class.