[ 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
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Grammar › ViewDoes you’re cat do this when you make him mad?
A. correct as it is
B. incorrect
Modal Verbs › View
Manu seems to be quite exhausted. He ________ take some rest.
A. should
B. might
C. ought to
D. must
Modal Verbs › ViewWhich 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