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.

She has the flu（流感）, so she can’t come to the party . .

To make your own study plan is a good way to become atop student. After your plan______, you should correct it from time to time,and then it will be more helpful.

Alan is looking forward to _____ on Saturday.

ronger the______ for acquiringlanguage skills is, the more quickly a language beginner will learn.