托业考试

根据网考网考试中心的统计分析，以下试题在2018/5/15日托业考试习题练习中，答错率较高，为：98%
【单选题】 Only five years ago, there ______a shortage of computer specialists.
A．(A) was
B．(B) were
C．(C) has been
D．(D) have been

网考网参考答案：A，答错率：98%
网考网试题解析：
The simple past tense is required. Choice (B) is past tense but does not agree with the singular subject shortage. Choice (C) is present perfect. Choice (D) is present perfect and does not agree with shortage. 查看试题解析出处>>