[ Vocabulary and Grammar ]
Global warming is a serious __________ to the planet.
A. scene
B. appreciation
C. threat
D. digest

Random Topics:
Auxiliaries VerbMixed GrammarVocabulary and PhrasesModal and Phrasal VerbsModal Verbs and ConditionalsLinking Words and ConjunctionFuture Tense and ConditionalsAdjectives (-ed / -ing)Preposition and Word FormLinking VerbsOther quiz:
-ed or -ing › ViewSometimes I get really ………………………………. when I can’t express myself well in English.
A. frustrating
B. frustrated
Grammar › View
When we ……………..at the station, the train ……………… .
A. arrived/ had left
B. arrived/ left
C. had arrived/ had left
D. had arrived/ left
