Question

The student worked ________, but, to our disappointment, he still failed in the final examination．

[　　]

A．

as hard as possible

B．

as hard as possibly

C．

as hard as he can

D．

so hard as he could

Answer 1

答案：A
解析：

表达“尽可能……”时，可用“as…as possible”或“as…as sb．can/could”。从本句中动词所表示的时间来看，结构中应用过去时态，故排除C项。