从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1．一Thank you ever so much for your timely help. 一__________.
A．Glad to hear that B．With pleasure
C．Think nothing of it D．All fight
2.In the countryside, _______ car is not yet _______ popular means of transportation.
A. the, a B. a, the C. the, the D. a, a
3. --- Ring me at six tomorrow morning, will you?
--- Why that early? I ______ .
A. will be sleeping B. have slept
C. have been sleeping D. will sleep
