Grammar Quiz

[ Grammar for TOEFL ]

Potassium has a valence of positive one because it usually loses one electron when _____ with other elements.

A. does it combine

B. it combines

C. in combining

D. combination

Select your answer:
         


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Other quiz:

Present simple, Present continuous, Singular, Plural › View

We … bread. (be, not eat)

A. not eat

B. not eating

C. are not eat

D. are not eating


Grammar › View

Which of the following sentences correctly uses an appositive?

A. My brother, a doctor, works at the local hospital.

B. My sister a teacher works at the local school.

C. My friend, who is a lawyer works in a law firm.

D. My cousin a dentist, he works in a clinic.