I’m sure that they had practiced hard for the games as they won a lot of medals.
A. They couldn’t have practiced hard for the games as they won a lot of medals
B. They must have practiced hard for the games as they won a lot of medals
C. They shouldn’t have practiced hard for the games as they won a lot of medals
D. They might have practiced hard for the games as they won a lot of medals.

Random Topics:
Grammar: so and suchTime Clauses of FuturePresent Perfect Simple vs ContinuousAbilityPRESENT SIMPLE vs PRESENT CONTINUOUS + QUANTPronouns, Sentence Structure, and ApostrophesPassive Voice Present SimpleVerb TensesPast Simple and Past Continuous TensesSimple Present vs Present ProgresiveOther quiz:
Grammar › ViewI was reading a novel at nine o’clock this morning.
What type of sentence is this?
A. Past Simple
B. Past Continuous
Direct and Indirect Question › View
Where did our teacher go?
A. Do you know where did our teacher went?
B. Do you know where our teacher went?
C. Do you know where did our teacher go?
Grammar › View-… did you arrive? -At about six o’clock.
A. When
B. What
C. Why
Relative Pronoun › View
John bought a boat .. costs thirty thousand dollars.
A. which
B. that
C. of which
D. who
