One of the most difficult problems ______ whenever we try ... | GrammarQuiz.Net

[ Tenses ]

One of the most difficult problems ______ whenever we try to achieve goals.

A. arise

B. arises

C. is arisen

D. are arisen

Select your answer:
A B C D E

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Which verbs are future perfect tense

A. had

B. has, have

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Identify the gerund

Many of the laughing students love singing.

A. Many

B. laughing

C. love

D. singing

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