My father was watching TV while I to the radio．（ ）
| A． |
listened |
| B． |
was listening |
| C． |
am listening |
Son, you have never been abroad, I'm worried about you．
Don't worry, mom． As soon as I , I you．（ ）
A．will arrive, call
B．will arrive, will call
C．arrive, will call
D．arrive, call
I think AI （人工智能） in many fields will to help us solve many problems in the future．（ ）
A．used, be usedB．is used, be used
C．used, useD．is used, use
If your friend sends you a message to borrow money from you on the Internet, you'd better call him first to make sure of that．（ ）
A．recentlyB．finallyC．hardlyD．directly
Paul, do you prefer weekdays or weekends？
Weekdays, of course． I'm on weekends．（ ）
A．busyB．much busier
C．more busierD．the busiest
Last summer holiday, I didn't go anywhere． How boring!
． But I'm going somewhere for a holiday this summer．（ ）
A．Neither I didB．Neither did I
C．So did ID．So I did