以下是一份英语考研入门试题及答案：
试题：
1. Which of the following is NOT a common feature of English vocabulary?
A. Prefixes
B. Suffixes
C. Abbreviations
D. Conjugations
2. Choose the correct tense to complete the sentence:
The professor ______ (teach) this course next semester.
A. will teach
B. teaches
C. taught
D. teaches
3. Identify the sentence that contains a logical error:
A. She is taller than her brother.
B. The book is more interesting than the movie.
C. He is richer than she is.
D. She runs faster than he.
4. Select the word that best completes the sentence:
The company ______ (launch) a new product line next month.
A. is launching
B. launched
C. will launch
D. will have launched
5. Choose the correct word to fill in the blank:
I ______ (not finish) my homework yet, but I will do it tonight.
A. don't
B. haven't
C. didn't
D. doesn't
答案：
1. D
2. A
3. C
4. A
5. B
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