You can’t predict everything. Often things don’t _____ as you expect.
Although it's raining, _____ are still working in the field.
Speak to him slowly _____ he may understand you better.
You'll miss the train ______ you hurry up.
When you read the book, you' d better make a mark _____ you have any questions.
We'd better hurry ______ it is getting dark.