478. Which of the options given below may suitably replace the phrase printed in bold to make it grammatically correct? If the sentence requires no correction, mark (d) as the answer.
When ice and water existed together on the same volume, the temperature remains constant.
When ice and water existed together on the same volume, the temperature remains constant.
479. Because we have a young baby, we . . . . . . . . the opportunity to go to the cinema any more, but now and again, we . . . . . . . . a video to play at home.
481. Fill in the blank with the appropriate simple future tense:
S: Do you know what to buy for your sister for her birthday?
T: Yes. I ________ her a book on hip hop music. (buy)
S: Do you know what to buy for your sister for her birthday?
T: Yes. I ________ her a book on hip hop music. (buy)
482. Man's use of pictures to tell stories and to record experiences . . . . . . . . prehistoric times, when he . . . . . . . . the walls of caves.
483. Fill in the blank with the most appropriate word.
It is very cloudy. I am sure it's _________.
It is very cloudy. I am sure it's _________.
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