【单选题】
____ he tried his best , he still failed the examination.
【单选题】
_________is considered to be the best-known English dramatist since Shakespeare.
【单选题】
One of the best ways [] can protect the environment is sustainable development.
【单选题】
_______ he tried his best, he still failed the examination.
【单选题】
_______ she tried her best, she didn’t succeed.
【单选题】
Mary is one of the best friend _____________ I have ever had.
【单选题】
Were it not for the rainny weather, they______ all right.
【单选题】
By the end of next month he ____ everything in school.
【判断题】
The construction of the building will have completed by the end of this month.