易错题The words “racecar”， “kayak” and “level” are the same ________ they are read left to right or right to left.
A.since B.though C.unless D.whether
(2020原创)I don't have any experience in this task ________ I come here. I am a green hand.
A.if B.unless C.before D.while
(2020原创)I need your help to pick out a shirt for me, the black one ________ the white one?
A.or B.so C.and D.but
(2019河北省保定市莲池区二模)She didn't go to swim ________ she finished her homework.
A.while B.when C.until D.before
(2019承德县一模)It's polite to avoid making noise ________ you're eating.
A.unless B.until C.after D.when
(2019石家庄41中一模)I didn't pass the exam ________ I worked hard.
A.since B.unless C.though D.whether
