[ Modal Verbs - Obligation ]
It’s not obligatory to take a tie. You …………. wear one.
A. must
B. mustn’t
C. don’t have to
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Vocabulary › Viewa substance, usually a solid, that is dissolved
A. solvent
B. solute
C. solution
D. product
Helping and Linking Verbs › View
Is the following underlined word a helping verb, linking verb, or action verb? She is eating pizza for dinner tonight.
A. action verb
B. linking verb
C. helping verb
Grammar › ViewWhy ……….. Nam want to go to the post office? Because he wants to send a letter.
A. are
B. does
C. do
D. is
Prepositions › View
I shall be back ……about twenty minutes times.
A. In
B. At
C. By
D. From