题目

下面的句子应该用什么时态呢...
1:When the student arrived at the lecture,the lecturer ____ (to explain) the marking criteria for the academic listening progress test.
2:By 2014,it is predicted that the population of Australia____ (to be) 23,000,000.
3:Advances in technology in the past 30 years____ (to bring) some wonderful things for communication.
4.Statistics____ (to be) numbers that represent facts or measurements.
5.The price of gold____ (to rise) at the moment.
6.The student was not permitted to do the exam because they arrived late to class and the exam____ (to start).
7.The value of the Australian dollar____ (to rise) steadily since the beginning of 2010.

提问时间：2021-02-12

答案

1.was explaining 时态搭配 一般过去时和过去进行时搭配2.will be 时态搭配 时间状语是by+将来的时间,所以使用一般将来时3.have brought .Statistics in the past 30 years是一个现在完成时的时间状语4.are 这表示的...