He is afraid to face the difficulty he thinks he’ll have _________ the driving test tomorrow; he finds it difficult _________ rid of the worries.

My brother was ____ that he didn’t want to go out.

It took us ________ to finish theexperiment on the monkey

Peter was so excited _________ he received an invitation from his friend to visit Chongqing.

Only after a baby seal is pushed into the sea by its mother _____ to swim.