In April last year, thousands of holiday-makers in Europe remained abroad due to the volcanic ash cloud.
A. sticking
B. stuck
C. to be stuck
D. to have stuck
网友回答
A. sticking
(答案→)B. stuck
C. to be stuck
D. to have stuck
解析：句意：去年四月份，成千上万名在欧洲的度假者，由于火山灰云仍然困在国外。 stuck 被困的，remained在这里为系动词，故选B。