题目内容:
For many years, people electric cars. However, making them has been more difficult than predicted.
A.had dreamed of
B.have dreamed of
C.dreamed of
D.dream of
参考答案:
For many years, people electric cars. However, making them has been more difficult than predicted.
A.had dreamed of
B.have dreamed of
C.dreamed of
D.dream of