John received an invitation to dinner, and with his work ________, he gladly accepted it.
In the 16-19 age group,1 of women smoke ______ 8 of men.
Though ______, many laws of nature exist.
While prices are rising so fast,many people are working out ways to________their expenses.
The course about Chinese food attracts over 100 students per year, ________ up to half are from overseas.
here yesterday, he could have seen Jackie Chen.