Every means ______ tried, yet no result ______encouraging up to now.
A.have been ...is | B.has been...has been | C.have ...has been | D.has...is |
推荐套卷
Every means ______ tried, yet no result ______encouraging up to now.
A.have been ...is | B.has been...has been | C.have ...has been | D.has...is |