I am still unable to make myself __________ in the discussion, which worries me a lot.

I think that the Great Wall is worth _______ hundreds of miles to visit.

The boy felt so sorry at the girl＇s dominance that he could remain _______ no longer.

She didn＇t receive the application form; it _______ to the wrong address.

For years, doctors ________ millions of patients＇ lives with the help of microscopes.

The students should be ________ for the things that they do.

In his report of the accident he _________some important details.

_______ his appearance, he comes from a well-off family.

The young people are ________ of their responsibility toward society.

________ the temperature falling so rapidly, we couldn＇t go on with the experiment.

We should be able to do the job for you quickly, ________ you give us all the necessary information.