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17. The doctor ______ when the doorbell started to ring.
18. The man asked the doctor ______.
19. The doctor and the man left ______.
20. What the man wanted to do was only ______.
21. We can infer(推断) that the doctor was ______ when he heard the man's words in the end.
A
18. The man asked the doctor ______.
B
19. The doctor and the man left ______.
D
20. What the man wanted to do was only ______.
C
21. We can infer(推断) that the doctor was ______ when he heard the man's words in the end.
B
答案
17. A 18. B 19. D 20. C 21. B
