问题
选择题
Tony, my best friend, has done _______ he can to help me out of trouble.
A.all that
B.all what
C.which
D.all which
答案
答案:A
考查句型:do all (that) sb can to do sth/ do what sb can to do sth尽某人所能去做某事,所以应选A,若选B应去掉all,句意:托尼,我最好的朋友尽他所能帮助我摆脱困境。