—Why do you look so worried? —My computer broke down and my essay ______ unfinished since.
At our factory there are a few machines similar to _______ described in this magazine.
It was not until near the end of the lettershe mentioned her own plan.
In some languages, 100 words make up half of all wordsin daily conversations.
No one _____ be more generous; he has a heart of gold.
I had hoped to take a holiday this year but I wasn’t able to ______.