问题
选择题
The new dictionaries are very useful. They ________ well and ________ already .
A．sell; have been sold out
B．sold; had sold out
C．sell; sell out
D．are sold; have been sold out
答案
A
“动词＋副词（well，easily，quickly等）”中的动词不必用被动式，这类动词有read，wash，sell，open，shut，clean，bum，pull，draw等。