[ Modal Verbs ]
Spectators…………_show their tickets before they enter My Dinh stadium.
A. must
B. have to
C. should
D. ought to

Random Topics:
Modals and PrepositionGrammar on ConditionalsTo Infinitive or Bare InfinitiveInterjections, Tag Questions and Nouns of Direct AddressSimple Past Tense & Future TenseGrammar - Present Perfect with already, just, yetTime ClausePassive Voice & TensesAdjective ending with ED & INGGrammar TOEFLOther quiz:
Present Simple Tense › ViewShe ……………… (study) Science at university.
A. study
B. studies
C. studys
D. studied
Past Tense vs Present Tense › View
We …… the 8th grade students.
A. is
B. am
C. are
D. was
Prepositions › View_____ it is a nice day tomorrow, we can go swimming.
A. If
B. Until
C. When
D. Before
Similes and Body Idioms › View
Phei Qinn was calm and ____________ during the spelling quiz.
A. as cool as a cucumber
B. as tough as nails
C. as loud as thunder
D. as good as gold
