that all the risks should be calculated in advance.
A: This is necessary
B: Which is necessary
C: That is necessary
D: It is necessary
A: This is necessary
B: Which is necessary
C: That is necessary
D: It is necessary
举一反三
- All the risks should be calculated in advance.This is necessary.可改写为：It is necessary that all the risks should be calculated in advance.
- We consider _____ lessons should be previewed before the class. A: that it necessary B: it that necessary C: it necessary that D: necessary it that
- We consider ____university students should do more reading during their spare time. A: necessary that B: necessary C: it necessary D: it necessary that
- A clear job intention is necessary in a resume, which should be __________.
- I find ____________ to make some changes. A: it is quite necessary B: that is quite necessary C: it quite necessary D: quite necessary