---Will you be _________ this evening, Mary?
---That depends. I am afraid I will be with my manager together discussing a plan.
A.convenient
B.suitable
C.available
D.efficient
答案:C
考查形容词。convenient 方便的,suitable 合适的available 可利用的,方便的,有空的efficient有效率的 “你晚上有空吗?”