Jim         a skilled worker for almost six years. He is an experienced manager now.
#100435
A
has been
B
had been
C
is
D
was
推荐题目
--How did she get infected? --She ________the virus without any protection.
#100265
A
exposed to
B
had been exposed to
C
had exposed to
D
was exposed to
 The pen      well, so it ___ well. 
#101517
A
is written, is sold
B
is writing, is selling
C
is written, sells
D
writes, sells