In April last year, thousands of holiday-makers in Europe remained ___________ abroad  due    to the volcanic ash cloud.                                                                                  
#102402
A
sticking
B
stuck
C
to be stuck
D
to have stuck
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He _______ foreigners in his cafe before, so he didn’t know how to serve the American family.
#102169
A
had rarely had
B
had had rarely
C
rarely had
D
had rarely
When I said someone cheated in the English exam, I ______ you.
#103548
A
wasn’t referring to
B
had referred to
C
hasn’t referred to
D
will refer to