题目内容
They swam in the river.(用at this time yesterday改写)They______ ______ in the river at this time yesterday.
答案:were swimming
解析:
解析:
| 因为是在过去的一个时间点发生的事情,所以要用过去进行时。
|
练习册系列答案
相关题目
They were walking ________ a forest after they swam _______ the river .
| A.through, cross | B.across ,through |
| C.through, across | D.across, across |