[ Vocabulary and Grammar ]
Scientists could_______ a way to clean up the oceans.
A. do
B. discover
C. make

Random Topics:
Gerund & InfinitivesVerbs and AdverbsConditional Sentence Type 2 and Type 3There is or There areTenses and Verb FormsTime and CalendarConjunctions and CommasConjunctions in Complex SentencesSubordinate ConjunctionsWill or Going toOther quiz:
Determiners & Quantifiers › ViewI have two little sisters________of whom are so obedient and cute that I really adore them.
A. both
B. neither
C. either
D. none
Modals › View
We got lost in Paris. We ____________________________(take) a map
A. should take
B. should taken have
C. should have taken
D. should takes
Relative Clauses and etc › ViewIn a big city like New York, __________ Jodie lives, it isn’t easy to meet people.
A. where
B. which
C. that
D. when
Prepositions of Time and Place › View
You shouldn’t go out ___ a cold morning like this.
A. on
B. in
C. at
