Explanation " The dog was barking at the beggar ." The correct preposition to use with " barking " when referring to targeting someone is " at ".

Explanation I had been working since 2 O’clock. " Had been working " is past perfect continuous tense. It is used to show an action that started in the past and continued up to another point in the past . " Since " is used with a specific point in time (like 2 O’clock).

Explanation The sentence "She will have left before you go to see her."  It requires a future perfect tense (will have + past participle) because it describes an action that will be completed before another future action ("you go to see her").

Explanation " Unless " means " except if " and fits logically here: The speaker is saying, "Do not watch TV except if I have nothing to do." " Unless " introduces the only condition when watching TV is allowed .

Explanation Usually in is used after trust or "believe". We trust in one God means ہم ایک خدا پر یقین رکھتے ہیں so the option "in" is best to keep the meaning of the original sentence .

Explanation We use " the " before " dollar " because we are referring to the official, specific currency of the United States (a unique entity). " The dollar " functions like a proper noun in this context (similar to " the euro " or " the yen ").

Explanation "I asked who had done it." The original sentence is a direct question in past tense ("Who did it?"). In reported speech : The reporting verb " said " changes to " asked " (as it's a question) The past simple " did " changes to past perfect " had done " (standard tense change in reported speech) The question structure changes to indirect statement structure (no question mark needed) The word order changes from question form to statement form

Explanation Spam is another name for junk Email junk email refers to unsolicited email messages, usually sent in bulk to a large list of recipients. *** Computer important Information: E-mail stands for:  Electronic Mail Father of E-mail:  Ray Tomlinson First E-mail sent:  1971 @  is used to divide an email into:  two parts SMTP  helps to send: E-mails SMTP stands for:  Simple Mail Transfer Protocol Received email is saved:  inbox Sent email is saved in:  sent box Maximum attachment size in Yahoo Email:  25 MB G-mail stands:  Google Mail Email spam also called:  junk email To close email account click:  sign out To create new E-mail:  Sign Up Email hacking means:  Illegal access to open email accounts  of others Junk email is also called:  Spam   At sign ( @ ): always a  part  of email address Sending an E-mail is similar to:  writing a letter A allows us to access our e-mail from anywhere:  Webmail interface  Bookmark :  is associated with Internet E-mail

Explanation Bulgaria Capital is Sofia . Bulgaria Currency is Lev . Bulgaria official language is Bulgarian . Bulgaria located is in Continent Europe . Bulgaria Primary Religion is Secular . Bulgaria Parliament called Narodno Sabranie . Tricks for Remember

Explanation The spine has 33 stacked vertebrae (small bones) that form the spinal canal.  The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx. Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused. **** Additional Information "Important For exam point of view" The  femur i s the longest bone in the human body and the shortest bone is the  stapes f ound in the middle ear.  A newborn child has  300  bones. *** The human skull is generally considered to consist of  twenty-two bones — eight cranial bones and fourteen facial skeleton bones. The human hand has 27 bones ****