从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项标号涂黑。
1．What lessons China can draw from financial crisis（金融危机）in the United States has become hot topic in Beijing.
A. the; a B. a; a C. /; the D. the; /
2. Jack recommended me a few foreign movies, but _______ was to my taste.
A. all B. neither C. some D. none
3. —Where have you been recently?
—I ________ in Hang Zhou on business for a week last month.
A. have been B. had gone C. had been D. was
