If you keep on ignoring the teacher’s advice, you will probably get into a situation______ you fall behind others in all subjects.

It was very cold ____ they still went swimming.

 I really wonder__________ he has posted me many parcels___________ we didn’t work together.

The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements.

You will succeed in the end _____________  you give up halfway.