【单选题】They have been trying to arrive at a practical solution______ the problem.
【简答题】Were they to arrive before we depart the day after tomorrow, we (have) a wonderful dinner party.
【单选题】When customers arrive, they have to _______.
C.
put their phones in a locker
【简答题】They have been trying to arrive at a practical solution ________ the problem. A) in B) to C) on D) with
【单选题】1956年在国际上首次分离到沙眼衣原体的科学家是:
【单选题】They have been trying to arrive at a practical solution ________ the problem.
【单选题】1956年在国际上首次分离到沙眼衣原体的科学家是: