You _____ drive your car so fast. It’s very dangerous.

The MP3 cost me about 2,000 yuan.— Well, it was crazy of you to spend so much money _____ you could buy a cheaper one[ ]

I think I should be allowed to make decisions_________ myself.

What he said just now ___________ me of that American professor.

What do you think of the book —-Oh excellent. It’s worth _________ a second time.