[ Tenses ]
The vulnerable ecosystems ____ the effects of pollution right now.
A. are suffering
B. suffered
C. suffers
D. will suffer

Random Topics:
Time ClauseInfinitives and ING FormsIndefinite and Reflexive PronounsInfinitiveFuture Perfect TenseAnalogyModal Verbs & Reflexive PronounsVerb PhrasesConditionals III - Mixed 1st, 2nd & 3rd ConditionalsParts of SpeechOther quiz:
Adverbs of Degree › View’This basket is __________ heavy. What did you put in it, Wendy?’ asked John.
A. very
B. too
C. enough
Grammar › View
The friends…. a castle.
A. build
B. builds