—Isn't it hard to drive downtown to work?—Yes,that's why I________to work by train.
. The doctor insisted that only by this ______ could the patient survive in the operation.
. Don’t lie to her. As ____ matter of fact, _____ word has come that you failed your last exam.
. ----Simon won the first prize in the math contest, do you know? ----Yes, ________, he’d won several first prizes on the subject.
. I hardly forget the time _________we took a training course in England.
. The public have been reminded to be _______of how the disease spreads.