[ Grammar ]
Identify the simple subject in the sentence below.
Does calcium carbonate make the shells of crabs and lobsters hard and stony?
A. calcium carbonate
B. shells
C. crabs
D. lobsters

Random Topics:
Third ConditionalsModal VerbsPrepositions and AdverbsSimple Future - PassiveNarrative, Past TensesDeterminersModal and Auxiliary VerbsNounsWH Questions and Simple Past TenseTime ConjunctionsOther quiz:
Grammar › ViewBoth CARE and Oxfam organisations have programmes to help people in underdeveloped countries ________ their lives.
A. make
B. risk
C. improve
D. start
Countable and Uncountable Nouns › View
behaviour
A. countable
B. uncountable
Simple Present vs Present Continuous › ViewI always_______my homework after school
A. does
B. am
C. do
D. am doing
Vocabulary › View
believe ___ buying good-quality clothes
A. with
B. for
C. in
