单项选择题
A. Here you are B. All right C. That's good D. Thanks
--I can't see the blackboard very well. --Perhaps you...
单项选择题--I can't see the blackboard very well. --Perhaps you need（）
A. examining your eyes B. to be examined your eyes C. to have examined your eyes D. to have your eyes examined
（）would you solve the problem if this method failedA. W...
单项选择题（）would you solve the problem if this method failed
A. What else B. How else C. How little D. How else
I have never （） such a man.A. hearB. hear ofC. hear fro...
单项选择题I have never （） such a man.
A. hear B. hear of C. hear from D. heard
