Fill in the blank with the most appropriate linking verb:
She ____ shocked, when she saw me.
We have to find out the linking verb for the given sentence. In order to find out the most suitable linking verb, we must understand what linking verbs are. Linking verbs are used to link the subject with it's complement/state or adjective. For example: Roshni is pale. 'Roshni' is the subject and 'pale' defines her state, these two are connected by a linking verb 'is'. Here, as the second half of the sentence is in past tense, the verb should be in past tense too. Let's have a look at the options.
Option A - 'Be' is a verb that explains one's state of being. There are various forms of 'be': is, am, are, was, were etc. 'She be shocked' is incorrect, as the word 'be' is usually used in future tense or it is replaced by its forms. Since, the sentence is in past tense, we can't use 'be'. Hence, option A is incorrect.
Option B - 'She appears shocked' is incorrect, as the other half sentence is in past tense. 'Appears' is a verb in its present form. Hence, option B is incorrect.
Option C - 'She become shock' is incorrect, because it neither matches the tense of the sentence, nor follows the subject-verb agreement. 'She' is a singular subject, so the verb should be 'becomes', however, as the other half of the sentence is in past tense, 'become' can't be used here. Hence, option C is incorrect.
Option D - 'She looked shocked, when she saw me.' is a correct sentence. The subject 'she' is linked with her state of being 'shocked', by the linking verb 'looked'. Here, 'looked' is in past tense. Hence, option D is the correct answer.