题目

1.Fibers of hair and wool are not continuous and must normally be spun into thread____ woven into textile fabcrics.
when to be/if they are to be
2.The ambassador heard that ____ at his ppost a year longer.
he be staying /he would be staying
3.—what do you think of the boxing match last night?
——I really ___ think Jackson _____
don't...has won/didn't ...would win
4.great efforts to increase agricultureal production must be made if food shortage ___ avoid.
is to be/can be/will be/has been

提问时间：2021-03-26

答案

1、when to be 这是非常简洁的用法.2、he would be staying 他听见别人说时,应当是"You will be staying",转述时,自然变成"would".3、didn't ...would win 问句虽然是用现在时态,但回答时用的是昨晚的想法.用don't ...