—Where is your son? —He_______ Beijing. He_______ there three times before.
A.has been to, has gone B.has gone to, has been C.has gone to, has been to
________ Mary________ Jack is listening to the report carefully, because they are both interested in it very much.
A.Not only, but also B.Either, or C.Both, and
My parents ________since 15 years ago. They are having a sweet life now.
A.have got married B.got married C.have been married
________he takes the medicine, ________ he can become healthy.
A.The earlier, the faster B.Earlier, faster C.The early, the fast
— Are these books_________? — No, they are not mine. They belong to_________.
A.your, her B.yours, her C.you, she
—Do you often use paper napkins?
—Seldom，________ they are cheap and easy to get.
A.since B.although C.because D.if
