The tense of the sentence is Future Perfect Tense. It refers to an action that will be completed at some point of time in the future. The subject is first person singular. Hence'shall have left is the appropriate option.

The tense of the sentence is Present Perfect Continuous. It refers to an action that began in the past and is still going on.Here the subject 'we' is first person plural, so,' have been living ' is the suitable option.

The tense of the sentence is Present Perfect Tense, as it refers to an action that has just completed. The subject of the sentence is third person singular, hence, has changed is the correct option.

The tense of the sentence is Simple Past. It refers to an action in the past. Here second form of the verb is to be used. Hence,'came' is the correct choice.

The tense of the sentence is Past Perfect.The sentence can be divide in two parts. In such sentence as these, the tense of the sentence is Simple Past. Here, second form of verb is used. Hence'returned' is the correct option.

The tense of the sentence is Simple Past. It refers to an action in the past. Here the second form of the verb is to be used. Hence,'wrote' is the correct choice.

The tense of the sentence is Past Perfect. The sentence can be divide in two parts In such sentence as these, the second tense of the sentence is Simple Past. Here, second form of verb is used. Hence'arrived' is the correct option.

The tense of the sentence is Simple Future as it refers to an action that will take place in future. The subject of the sentence is first person plural. Hence,shall with first form of verb is to be used. 'Shall go' is the correct option.

The tense of the sentence is Future Perfect as it refers to an action which will be completed at some point of time in future. The subject of the sentence is first person singular.Hence shall have and third form of the verb are to be used. 'Shall have completed' is the correct option.

The tense of the sentence is Simple Future as it refers to an action in future. The subject of the sentence is third person singular. Hence.will and first form of verb are to be used. "Will" become is the correct option.

The tense of the sentence is Future Perfect as it refers to an action which will be completed at some point of time in future. The subject of the sentence is third person singular. Hence will have and third form of the verb are to be used.' Will have submitted' is the correct option.

The tense of the sentence is Past perfect. It refers to an action which was completed before the other began. Here 'had' is used with the third form of the verb. Hence'had left' is the correct option.

The tense of the sentence is Simple Present.It refers to a habitual fact. The subject of the sentence is first person singular.It will not take 's' after it. Hence'believe'is the correct option.

The tense of the sentence is Present Perfect. It denotes an action completed at the time of speaking. The subject of the sentence is third person singular. Hence, 'has been' is the correct choice.

The tense of the sentence is Simple Present as it speaks of a habitual fact. The subject of the sentence is third person singular, so the verb takes 'es' after it. Hence, 'goes is the correct option.