12. Which of these sentences is punctuated correctly?
a. The students’ bag appeared to be quite heavy when it was checked by the teacher.
b. If your friend had come earlier, I wouldv’e introduced her to my boss.
c. The power failure occurred exactly at 8 and lasted for a couple of hour’s.
d. Ram’s insect collection includes grasshoppers, moths and beetles.
13. Choose the expression that BEST replaces the underlined word in the sentence below.
He is the kind of person who can deliver a speech immediately.
a. At the drop of a hat
b. To drop dead
c. As a drop in the ocean
d. To drop dead
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13)--as a drop in the ocean
13) A At the drop of a hat