All the students were excited that English would become an optional course.
She may have missed the train, ______ she won’t arrive for another hour.
— Jack, this is the third time that you have been late this week. — Sorry, sir, but I was ______ for 15 minutes on the way here in the traffic jam.
Without that conversation between them, they would ______ be able to avoid mistakes.
The zoologist is telling the visitors how a horse’s vision differs from ______ of a human.
This book will show the readers ______ can be used in other contexts.