When he ______ his hair cut, he went to the cinema.

Here are the solutions to the questions:

Question 19: "When he ______ his hair cut, he went to the cinema."
This sentence describes a past event where one action (getting a haircut) happened before or led to another past action (going to the cinema). The structure "have something done" is used for causative verbs. Since "he went" is in the past simple, the first clause should also be in a past tense. "Had" is the past simple form of "have".
The correct option is (a) had.

• Answer: (a) had

Question 20: "If you wait here; I ______ if the Manager is in."
This is a Type 1 conditional sentence, which describes a real and possible situation in