WWF ______ a great green organization for many volunteers to protect the animals.
A. considers B. is considered C. has considered D. is considering
答案:B
解析:WWF被认为是一个……,在本句中使用被动语态。正确形式应为is considered。
Liu Xiang ________by his coach to train regularly.
A.advised B.advises C.was advised D.be advised