从Ａ、Ｂ、Ｃ、Ｄ四个选项中，选出可以填入空白处的最佳选项，并在答题卡将该项涂黑。
21. --- Thank you ever so much for your timely help?
--- ____________ .
A. Glad to hear that. B. With pleasure. C. Thank nothing of it. D. All right.
22. Numbers of terrorists attacks in the past few years have signaled that anti-terrorism remains _____ long term goal for______ world.
A. a; a B. the; a C. a; the D. the; the
23. ---- What’s our homework for today, Tom?
---- Oh, sorry. I ______.
A. hadn’t paid attention B. was not listening C. am absent-minded D. couldn’t hear
24. Some of our industrial products have been said advanced level.
A. to reach B. to be reaching C. to have reached D. to have been reaching
