A sneeze cannot be performed voluntarily, ________ be easily suppresse.

1. A.
   nor it can
2. B.
   nor can it
3. C.
   it cannot
4. D.
   and cannot it

?______ did he sneeze?

桬very ten minutes.

A.How long　　　　

B.How often

C.How old　　　　

D.How soon

 You can’t sneeze and keep your eyes _______ at the same time.

A. open             B. opens                 C. opened                D. opening      

You can’t sneeze and keep your eyes _______ at the same time

1. A.
   open
2. B.
   opens
3. C.
   opened
4. D.
   opening