Question

32.She knew everything about Mr. Smith’s news. She _______ him.

A. should call B. should have called
C. has to call D. must have called
//33.I think you _____ them to confirm the tour!
A. should call B. should have called
C. has to call D. must have called

Answer 1

32. B

33. A

Step-by-step explanation:

Using the tense system, in 32 it says "She knew" knew is past tense, so "should have called" would be the answer as it is past tense.

In 33 its talking of something that is going to happen so using "should call" would fit the future tense.