Sentences from column A can be correctly completed by pairing them with the appropriate choices from column B, taking into account context, and being mindful of the logical match between the sentences and choices.
Completing Sentences with Correct Choices
To correctly complete the sentences from column A including proper use of crowd, study and sentence structure, one could match them with the corresponding phrases from column B. Here is the completed activity:
You'll get tired if you stand up for a long time.If you go to a football match, you won't find a seat on a crowded bus.You can't hear the teacher if students make a lot of noise.I'll help you with your lesson, if you want to study.If the soup is too hot, you must take your umbrella with you (This combination seems illogical, but based on available options; a better match couldn't be found among the given sentences and choices).If it rains, c) you must take your umbrella with you.His family may go on holiday if they save enough money.A man can't buy what he needs if he doesn't have enough money.If you're on a crowded bus, you won't find a seat.We'll come to visit you if you're at home tonight.If they haven't seen Topkapý Palace, we'd better go there this afternoon.If I get a driving licensee, I'll buy a car.
Note that some sentences from column A were not ideally matched with choices from column B, as the exercise appears to contain errors or lacks appropriate options for some of the sentences.