问题
选择题
Wait till you are more ________. It’s better to be sure than sorry.
A．alternative
B．satisfied
C．optimistic
D．certain
答案
答案：D
词义考查题。alternative“二中择一的、交替的”；satisfied“感到满意的”；optimistic“乐观的”；certain“感到有把握的、确信的”。根据It’s better to be sure than sorry可知，答案应为D。