Question

---Will you walk a little faster?　 ---I was afraid you could not _____ . A．walk up B．go 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

Answer 1

C

短语辨析。   A. 走上；等着       B. 增长；上升       C.保持；继续  ；不落后   D. 赶上。句意：你能走的快一点吗？——我恐怕你跟不上。catch up强调开始是落后的，从后面追上。keep up强调始终保持跟在后面，不掉队。结合语境可知选C。