There is some doubt Mr Zhang will sign the contract with us.
A. when
B. whether
C. if
D. that
网友回答
A. when
(答案→)B. whether
C. if
D. that
解析：考查doubt的用法。doubt用于肯定句时用whether引导同位语从句；用于否定句时，用that引导。例如：There is no doubt that...“......是毫无疑问的。”；There is some doubt whether he will e.。本题k肯定句，故用that，句意张先生会和我们签订这份协议时毫无疑问的。