The tense of the sentence is Present Perfect Tense as it indicates an action that began in the past and is still going on. The subject of the sentence is third person singular. Here 'has been' and -ing form of the verb is to be used. Hence 'has been waiting' is the correct option.

The tense of the sentence is Future Continuous as it refers to an action as going on at some point in future. The subject of the sentence is third person singular. Here 'will be' with -ing form of the verb is to be used. Hence 'will be sitting' is the correct option.

The tense of the sentence is Future Continuous as it refers to an action as going on at some point in future. The subject of the sentence is third person singular. Here 'will be' with-ing form of the verb is to be used. Hence 'will be waiting' is the correct option.

The tense of the sentence is Present Perfect Tense as it indicates an action that began in the past and is still going on. The subject of the sentence is third person plural. Here 'have been' and-ing form of the verb is to be used. Hence 'have been living' is the correct option.

The tense of the sentence is Present Perfect as it denotes an action completed at the time of speaking. The subject of the sentence is third person singular. Here 'has' plus the third form of the verb is to be used. Hence 'has worked'  is the correct option.

The sentence refers to an accepted fact. The tense of the sentence is Simple Present. The subject of the sentence is third person plural. Here first form of verb will be used. Hence 'bring' is the correct option.

The tense of the sentence is Present Perfect as it denotes an action completed at the time of speaking. The subject of the sentence is third person plural. Here 'have' plus the third form of the verb is to be used. Hence 'have won' is the correct option.

The sentence refers to a universal fact. The tense of the sentence is Simple Present. The subject of the sentence is third person singular. Here first form of verb will take 's' after it. Hence 'moves' is the correct option.

The sentence refers to an accepted fact. The tense of the sentence is Simple Present. The subject of the sentence is third person plural. Here the first form of verb will be used. Hence 'revolve' is the correct option.

The sentence refers to a universal fact. The tense of the sentence is Simple Present. The subject of the sentence is third person singular. Here first form of verb will take 's' after it. Hence 'keeps' is the correct option.

The tense of the sentence is Present Continuous tense as it indicates an action going on at the time of speaking. The subject of the sentence is first person singular. Here 'am' with-ing form of the verb is to be used. Hence,'am doing' is the correct option.

The tense of the sentence is Present Continuous tense as it indicates an action going on at the time of speaking. The subject of the sentence is first person plural. Here 'are' with-ing form of the verb is to be used. Hence,'are taking' is the correct option.

The tense of the sentence is Present Continuous tense as it indicates an action going on at the time of speaking. The subject of the sentence is third person plural. Here 'are' with-ing form of the verb is to be used. Hence,'are ploughing' is the correct option.

The tense of the sentence is Simple Present as it simply refers to an action. The subject of the sentence is third person singular, so the verb will take 's' after it. Hence, 'wants' is the correct option.

The tense of the sentence is Simple Future as it refers to an action in the future. The subject of the sentence is first person singular. Here 'shall' with first form of the verb is to be used. Hence 'shall write' is the correct option.