She was afraid __________ the dog in case it became dangerous.
It is difficult to ________ one twin from the other. They almost don’t ________ from each other.
—I’m sure Andrew will win the first prize in the final.—I think so. He ________ for it for months.
It didn’t ________ to me that the naughty boys should have ________ to prove what we discussed the day before.
When asked why he went there, he said he was sent there ________ for a space flight.
He objects to ________ the students do their homework late at night.