Complete the sentence with past simple or present perfect using the correct form of the verb. When she (look) up, I realized that she was crying.

The sentence describes a past event that happened before another past event (realizing she was crying). Therefore, the past perfect tense is appropriate for the action of looking up. The correct form of 'look' in the past perfect for 'she' is 'had looked'. However, 'had looked' is not an option. The sentence structure 'When X happened, Y happened' often implies a sequence of events in the past, where the first event is completed before the second. In this context, 'When she looked up' (past simple) describes the immediate trigger for the realization. Among the given options, 'looked' is the past simple form of 'look'. The sentence implies a completed action in the past that led to the realization. Thus, the past simple is the most fitting choice here. The options 'has look', 'has looked', and 'have looked' are present perfect forms and do not fit the past narrative. 'lookt' is not a valid English word. Therefore, 'looked' is the correct answer for the past simple tense, fitting the context of the sentence.

The sentence requires a past tense verb to describe an action that occurred before the realization of crying. The structure 'When X happened, Y happened' suggests a sequence of past events.

The options provided are: 'has look', 'has looked', 'have looked', 'lookt', and 'looked'.

Considering the context and the available options, 'looked' is the past simple form of the verb 'look' and correctly completes the sentence, indicating a completed action in the past that led to the realization.

looked