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Lesson Example Discussion Quiz: Class Homework

Example

Title: Boundaries

Grade: best-sat Lesson: S6-P1

Explanation: Let us discuss a few examples regarding the topic.

Examples:

Short Passage:

Materials scientist Marie-Agathe Charpagne and her colleagues believed they could improve on the multicomponent alloy NiCoCr, an equal-proportions mixture of nickel (Ni), cobalt (Co), and chromium (Cr), by replacing chromium with ruthenium____the alloy that resulted, NiCoRu, turned out to be an unsuitable replacement for NiCoCr.

Question:

Which choice completes the text so that it conforms to the conventions of Standard English?

A) (Ru)

B) (Ru) but

C) (Ru),

D) (Ru), but

Answer:

D) (Ru), but

Tip :

Choice D is the best answer. The convention being tested is the coordination of main clauses. This choice correctly uses acomma and the coordinating conjunction “but” to join the fi rst main clause (“Materials…Ru”) and the second main clause(“the alloy…NiCoCr”).