注意：此页面搜索的是所有试题
题目内容
（石家庄铁道大学-大学英语3）
There are some police cars in front. What do you suppose _____？
A、 is the matter
B、 is happened
C、 is the wrong
D、 the trouble is
A、 is the matter
B、 is happened
C、 is the wrong
D、 the trouble is
参考答案
