(     )1. --- __________ did Charles Smith hiccup?  --- For about two weeks.

       A. How soon         B. How far                   C. How long          D. How often

(      )2. The ice on the lake was too thin for us ___________ yesterday.

       A. skating       B. to skate      C. skated D. to skating

(   )3. –--Do you have any plans for your summer vacation?

---I am ______ for London next Sunday.

A. going to B. leaving          C. will go       D. will leave