Fill in the Blanks

Both keep back and hold back have the same meaning. To keep something back is to keep it a secret.

To mull something over is to think about it.

To make away is to escape. Make off has the same meaning. When you make for a place, you move towards it.

Only option 4 constructs the sentence correctly. In continuous tense, we use 'auxiliary + verb+ing'.  .

Case of passive voice, where we use third form of the verb with auxiliary.  Also, 'a group' is singular entity, requiring use of singular helping verb 'is'. Option 2 is the correct answer.

Case of passive voice. Option 4 constructs the sentence in present perfect tense.

'Today' means present tense. Singular subject (electricity crisis) takes singular verb.

Case of passive voice, where we use third form of the verb with auxiliary.  Also, 'children' is plural noun; so children 'are'.Option 3 is the correct answer.

Case of passive voice, where we use third form of the verb with auxiliary.  Options 1,2 and 3 do not convey any meaning. Option 4 is the correct answer.

Case of passive voice, where we use third form of the verb with auxiliary. Option 3 is the correct answer.

Case of passive voice, where we use third form of the verb with auxiliary. Option 3 is the correct answer.

Case of passive voice, where we use third form of the verb with auxiliary. Option 4 is the correct answer.

Case of imperative sentence in passive voice. 'Get it completed' is the correct usage.

From the sentence it is clear that the event is continuing at present. So present continuous form will be used.

Case of passive voice, where we use third form of the verb with auxiliary.Option 2 is the correct answer.