[ Mixed General Quiz ]
Brazil possesses rich minerals and soil; however, the country’s resources have yet ___ .
a. to be surveyed
b. be surveyed
c. to be surveying

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Gerund & InfinitiveConnectives (because, due to, owing to, because of)Perfect and Past TensesQuantifies and Modals of DeductionSubordinate ConjunctionsPunctuationsPronunciation and VocabularyModals - Have to or ShouldPast Simple TenseConjunctions & InterjectionsOther quiz:
Grammar › ViewThe suitable suffix for the word instruct is :
A. er
B. ist
C. ion
D. or
Mixed Tenses › View
Differentiate between past perfect, present perfect, and future perfect tenses in the following sentence: By the time she arrived, I had already finished my homework.
A. Past perfect, present perfect, future perfect
B. Past perfect continuous, present perfect continuous, future perfect continuous
C. Past continuous, present continuous, future continuous
D. Past simple, present simple, future simple