单项选择题
A. the less expensive one B. one most expensive C. a least expensive D. the most expensive of them
Both Tom and Mary （） the exam.A. has passedB. have past...
单项选择题Both Tom and Mary （） the exam.
A. has passed B. have past C. have passed D. had passed
She showed him the photo she() the day before.A. has ta...
单项选择题She showed him the photo she() the day before.
A. has taken B. took C. was taking D. had taken
We've done once but failed. We'll have to do it()time.A...
单项选择题We've done once but failed. We'll have to do it()time.
A. a second B. the second C. the twice D. twice
