单选题：_____these interruptions, the meeting would have finished ea..

Mr Smith ________ his wife and daughter ________ going to the Great Wall. [ ] A. as well as; isB. as well; areC. as well as; areD. as well; is

—What’s the matter with you?—______ the window, my finger was cut unexpectedly.[ ]A. Cleaning B. To clean C. While cleaningD. While I was cleaning

There are many kinds of sports , _____ my favorite is swimming . [ ]A. as B. then C. so D. but

What an unforgettable experience!I'll write it down _____ it is still fresh in my memory.[ ]A. sinceB. whileC. afterD. until

—Why didn't you chat with that friendly foreigner just now?— I'd like to, but the trouble was ________ he said was difficult for me to understand. [ ] A. what which B. that whatC. that thatD. what that