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:
A  B  C  D  E 


Random Topics:

Past ParticiplesTenses and VoicePassive SentenceFuture Perfect vs Future ContinuousSuperlativesPassive Voice Present SimpleSimple Future TensePrepositional PhraseVerbs & Phrasal VerbsThere is or There are

Other quiz:

Modal Verbs › View

Which modal verb is used to express possibility in the present: May or Might?

A. Can

B. Might

C. Would

D. Shall

Simple Present Tense vs Present Continuous Tense › View

(he/eat) rice every day?

A. Does he eat

B. Do he eats

C. Is he eating

D. Are he eating

➤