— May I _____ Helen?
— This is Helen speaking. [ ]
A. speaking
B. speak
C. speak to
答案:C
— My son failed to be accepted by the firm after the interview.
— Now that he wasn’t well prepared, he might as well ______.
A.not try
B.not to have tried
C.not to try
D.not have tried
ZJ70D钻机的名义钻深范围为(114mm钻杆)4500~7000m,(127mm钻杆)为()m。