The location of the borders of Saudia Arabia ___ both Yemen and Oman are not precisely known because they lie in a huge desert called “The Empty Quarter.”
a. between
b. with
c. by
d. for

Random Topics:
Grammar (Possessive Pronouns)Adjective SuffixesClause Markers TOEFL GrammarGrammar - some / anyFirst & Second ConditionalTime ConjunctionsPerfect and Past TenseZero Conditional SentencePast Tense and Past ContinuousGrammar, adverbs of frequency placementOther quiz:
Vocabulary › ViewCollection; a sum of many parts.
A. Sum
B. Prosperity
C. Total
D. Aggregate
Grammar › View
Nowhere________the fresh and peaceful air like here.
A. can you enjoy
B. you can enjoy
C. you enjoy
D. you do enjoy
Grammar › ViewWhat change, if any, is needed for the following sentence?
My brother play golf at the golf course near our house.
A. Change play to plays
B. Change brother to Brother
C. Change golf course to Golf Course
D. No change is needed
Degrees of Comparison › View
Most students think that Mathematics is ________ than other subjects.
A. More expensive
B. More beautiful
C. More diligent
D. More difficult
