Is Dr. Wang ______ today-No, He is busy prearing for an operation.

One of my classmates________ the USA.—- ReallyWho

I phoned Sarah last night, ______ there was no answer.

The truck ran down the hill, and the driver _____, according to the local newspaper, to have been killed

She told herself not to let negative thoughts _________, but, whenever she slept, her past life rose before her and she could not help feeling helpless.