[ How much and how many ]
How ___ trees do we need to produce enough oxygen for a person?
A. Many
B. Much

Random Topics:
Common Grammar Mistakes and Spelling TipsGrammar and EssayTenses and ComparisonsGrammar - used toTenses and PronounsSimple Present & Present ProgressiveShould, Should not haveSo, Such, Many, Muchanother/the others/each other/one anotherNouns, Pronouns, Antecedents, and Singular and PluralOther quiz:
Grammar › ViewBy Christmas, I _______ for Mr. Smith for six years.
A. will have been working
B. will work
C. have been working
D. will be working
Grammar › View
Fill in the blank:
Dinosaurs existed at the beginning of time.
These times were called ___historic.
a. non-
b. pre-
c. un-
d. re-
The conductor_______gives the musicians non-verbal signals with his hands or by using a small stick called a baton.
A. whether
B. either
C. neither
D. both
Grammar › View
I will never forget _____ to London for the first time. It was amazing!
A. to go
B. going