Take your vaccination certificate with you ____they ask for it at the airport.（ ）
- A.unless
- B.in case
- C.when
- D.because of
正确答案及解析
正确答案
B
解析
选项C不符合题意，选项D后应接短语。in case意为“以防万一”，故选B。
Take your vaccination certificate with you ____they ask for it at the airport.（ ）
选项C不符合题意，选项D后应接短语。in case意为“以防万一”，故选B。
