—Do you know what to do in the lab, Mike?
—Oh, sorry I don’t----just _____if I could get a ticket for the Shanghai Expo.
A. wonder B. wondered C. wondering D. having wondered
—Do you know what to do in the lab, Mike?
—Oh, sorry I don’t----just _____if I could get a ticket for the Shanghai Expo.
A. wonder B. wondered C. wondering D. having wondered
C