1. [单选题]19.
A. What
B. How
C. Where
2. [单选题]五氧化二氮的化学式是( )
A. 5O2N
B. O5N2
C. N2O5
D. 2N5O
3. [单选题]2.I _________to visit Guilin and I_________ you to go with me.
A. wish ; hope
B. hope; wish
C. hope; wish for
D. wish; hope that