The second half of his voyage was __________ dangerous part, during which he sailed round the Cape Horn.

The door still remained ___.

The country needs a _____ government. We have had three Prime Ministers in a year.

If you tend to regularly suffer from a certain symptom like headache, be sure to keep in store the       medicine to take care of the issue as soon as it starts.

Once I am_________to carry out my plan, nothing can      .