Complete the sentence with the correct form of the verbs given in the bracket:
The new railway bridge ______ two weeks ago. (complete)
a) was completed
b) was completing
c) would be completed
d) will be completed

Hint: A verb is a content word that denotes an action, occurrence, or state of existence. A verb is the word class that serves as the predicate of a sentence.

Complete answer:
In the given question, we have to find out which of the given options includes the answer in the simple past tense, as the usage of ‘two weeks ago’ indicates that the bridge finished completing in the past two weeks.
Let us thus analyze the options given to us in this question:
Option (a.), 'was completed', refers to ‘was’, which is in simple past tense. Therefore, option (a.) is correct.
Option (b.), ‘was completing', refers to ‘was’, which is in simple past tense, and ‘completing’, which is in the past continuous tense. Therefore, option (b.) is incorrect as we need the answer in the simple past tense.
Option (c.), ‘would be completed', refers to ‘would’, which is in the future tense. Therefore, option (c.) is incorrect as we need the answer in the simple past tense.
Option (d.), ‘will be completed', refers to ‘will’, which is in the future tense. Therefore, option (d.) is incorrect as we need the answer in the simple past tense.

Note:
 In this question, it will be helpful for the student to recall the concept of tenses. Tense is a grammatical category of verbs used to express distinctions of time. There are three tenses - past, present, and future.