[ Grammar ]
PUNCTUATION: Are the comma(s) in the right place(s) in the following sentence (if any)?
In theory, the dark smoke from the burning oil wells absorbs sunlight, and the surrounding air is heated.
A. Yes
B. No

Random Topics:
ComparativesArticle and Order of AdjctiveAdverb of Frequency and Past Continuous TenseIndefinite ArticleAction VerbVerb, Object, PrepositionPast Perfect SimpleNouns and QuantifiersAdjectives and DegreesModals for Ability, Possibility and PermissionOther quiz:
Modal Verbs › ViewI think you _____ visit the doctor for your cough.
A. would
B. should
C. need to
D. must
Reported Speech › View
They asked me when _______.
A. did I arrive
B. will I arrive
C. I had arrived
D. I can arrive
Subject Verb Agreement › ViewEach teacher and student ______ a pen.
A. has
B. have
Mixed General Quiz › View
We need a ___ of rice to make our special chicken and rice dish.
a. box
b. gallon
c. loaf
d. teaspoon
