He is afraid to face the difficulty he thinks he’ll have the driving test tomorrow; he finds it difficult rid of the worries.
We worried about ______ he was in good health.
I ______ the novel by the time you ______ back next week.
The number of the audience, ______ we had expected, was a thousand.
Having been born on the earth, we had no choice but ________ hospitality it offered.
The enemy troop could hardly make any advance, and ________ could they fall back.