Susan may have missed her train, in _______ case she won’t arrive for another hour.
"Can’t you read?" Mary said ______ to the notice.
Look, they seem _____ about you.
My brother ______singing ______ dancing while I _____ dance _____sing.
Mr. Chen is a teacher and works very hard. _________ his wife.
The car was stopped by highway man, while ______ through a forest.