More than twenty students in that university abroad to study medicine last year.
A,sent B.were sent
C.had sent D.had been sent
In my eyes, one of the best ways to lose weight is regularly in your daily life.
A. exercise B. to exercise
C. exercises D. exercised
helpful advice you you gave us on protecting personal information the other day！
A. What B. What a
C. What an D. How
We all believe you will succeed in working out the problem you give up.
A. if B. because
C. since D. unless
People throughout the world together now to protect the natural environment.
A. are working B. worked
C. will work D. have worked
A： have you talked with your friends on Wechat？
B：Since I came back from the post office.
A. How far B. How often
C. How soon D. How long
