__ he has limited technical knowledge, the old worker has a lot of experience.
A. Since B. Unless C. As D. Although
As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
A. primary B. alternative C. instant D. unique
The old lady’s hand shook frequently. She explained to her doctor this shaking had begun half a year before, and , only because of this, she had been forced to give up her job.
A. when; how B. how; when C. how; how D. why; why
Mary kept weighing herself to see how much _______ she was getting.
A. heavier B. heavy C. the heavier D. the heaviest
—How is everything going on with you in Europe?
—Quite well. Not so smoothly as I hoped, __________.
A. though B. instead C. either D. too
At times ,worrying is a normal, ________response to a difficult event or situation—a loved one being injured in an accident , for example.
A．effective B．individual C．inevitable D．unfavorable
