---Will you walk a little faster?
---I was afraid you could not _____

1. A.
   walk up
2. B.
   go up
3. C.
   keep up
4. D.
   catch up

---Will you walk a little faster?The meeting is about to begin．

---Faster?I was afraid you could not ________．

1. A.
   walk up
2. B.
   keep up
3. C.
   go up
4. D.
   run up

---Will you walk a little faster?

　 ---I was afraid you could not _____ .

   A. walk up       B. go up       C. keep up     D. catch up