23.What do you think of his proposal that improvements ______ in the old type of vacuum cleaner?

题目

23.What do you think of his proposal that improvements ______ in the old type of vacuum cleaner?

答案

答案应该是be made 选AWhat do you think of his proposal that improvements ________ in the old type of vacuum cleaner.A) be made B) will be made C) would be made D) will have to be made你认为他关于改善...