Some people find it really difficult to learn English, and here are some of the reasons. (37) ______. Therefore, it is very hard for English learners to (38) ______ as well as use them correctly in different contexts. Secondly, English grammar is complex. For example, there are twelve basic tenses in English. This makes learners confused when they have to use the tenses correctly in different sentences. Other grammatical points, (39) ______ are not any less challenging. Thirdly, a lot of learners find English pronunciation very confusing. Words which have the same combination of letters may be pronounced differently. For instance, the 'ou' in 'rough' is not pronounced the same as that in 'through'. (40) ______. The stress we put on different words may lead to a difference in meaning. In general, English vocabulary, grammar, and pronunciation may make learning it not an easy task.
A. Another problem is sentence stress
B. Firstly, English has one of the biggest vocabularies of all languages
C. remember all the words and phrases
D. such as prepositions, reported speech, and the passive voice
Question 37. __________