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:
Past Perfect and Past Perfect ContinuousTo infinitive - GerundFuture TensePresent Simple and Continuous TenseVerbs: Action, Linking, and Helping1st & 2nd ConditionalsConjunctions and CommasCohesive DevicesSubject/Verb Agreement with Collective NounsCompliment, Congratulation, and HopeOther quiz:
Grammar › ViewHow does a regular verb form its past and past participle?
A. By adding -ed or -d to the present form
B. By changing the vowel in the middle
C. By adding -ing to the present form
D. By adding -s to the present form
Simple Past Tense › View
I … (study) lastnight.
A. study
B. studyed
C. studied
D. studying
Comparision › ViewThat test was ___________ than the previous one last week.
A. difficult
B. so difficult
C. more difficult
D. the most difficult
Vocabulary & Grammar › View
. Which sentence uses a preposition correctly?
A. The cat is under the mat.
B. The cat is beside the mat.
C. The cat is with the mat.
D. The cat is on the mat.
