What an unforgettable experience!I'll write it down _____ it is still fresh in my memory.
[ ]
A. since B. while C. after D. until
参考答案:
—Why didn't you chat with that friendly foreigner just now?..
—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