第一节语法和词汇知识 (共15小题；每小题1分，满分15分)
21. _________ I picked up the receiver, I realized that someone had dialed the wrong number.
A. The moment B. A moment ago C. After a minute D. Minute after
22. Why so many youths are _____ on playing computer games often puzzles us a lot.
A. fascinated B. crazy C. keen D. fond
23. With all the family members ______ on vacation without him, the boy felt extremely lonely and afraid.
A. to have gone B. going C. had gone D. gone
24. She made a promise _______ anyone could save her life, she would give him all her wealth.
A. which if B. that if C. that D. if
