A. 对 B. 错
A. must left B. must have left C. must leave D. must be leaving
A. request slip B. requesting slip C. requst slips D. requst slip
A. regions B. places C. place D. region
A. charger B. electric charger C. electronic charger D. charging
A. see B. see to C. seeing D. sees to
A. did; been B. had; be C. had; been D. had; being
A. cosmetics B. cosmetic C. cosmetics cases D. cosmetic case
A. a set of B. a set C. sets of D. sets
A. might see B. might have seen C. might saw D. might have saw