For some time the expert __________ people of the health risks caused by passive smoking. He     says he won’t stop until all the smokers around him decide to quit smoking. 
#102620
A
is warned
B
is warning
C
has been warning
D
has been warned
推荐题目
Tim ____since he lost his job three weeks ago.
#101002
A
had been unemployed
B
was unemployed
C
has been unemployed
D
has unemployed
 —Why don’t we choose that road to save time?—The bridge to it _____________.
#100093
A
has repaired
B
is repaired
C
is being repaired
D
will be repaired