_____ you have the chance to go to the university in the future, you must take it.

I wrote a letter to John for his help during my high school years. without which I  the college entrance exam.

The new law states that people _________ drive after drinking alcohol.

Some aspects(方面) of a teacher’s job ______ be tiring, and teachers often ______ work at inconvenient hours.

You       trust an online shop just because it has a beautifully-designed website.

It’ s suggested by experts that teenagers ____at least 30 minutes exercising, five times a week.

The general demanded that the soldiers _____ at the village before 5p.m. to rescue the victims of the earthquake.

There have been demands for the prime minister that he ______ office since the incident happened.

I was supposed ____ her, but I failed.

——How about your new school?——I couldn’t feel _____ about it. All my teachers are very kind and helpful.

To order tickets for the 2016 Riode Janeiro Olympic Games, just call 00982012. It _______ be simpler.

Thank you so much! But for your text message, I ______  home without my ID card yesterday.

----My e-dictionary is nowhere to be found. Who ______ have taken it? -----Keep looking and you will find it. ________ you have good luck! 

Emergency line operators _______ always stay calm and make sure that they get all the information they need to send help.

The command has just arrived that all employees ____________ in their proper uniforms before 7:00 pm.

--Were you in time for the meeting?-- If I _________earlier, I would have .

She often shares her deepest thoughts and fears with friends through QQ, as if they______   chatting in her living room. 

His brother met him at the Great Theatre yesterday afternoon, so he ____ have attended your lecture. 

As many as 150 miners died in the accident．If only the mine - owners ____ enough attention to the safety measures!

 Had it not been for your help, I _____ penniless today.