[ Grammar ]
We never know what might have happened, … the email earlier
A. If he sent
B. If he has sent
C. Had he sent
D. did he send

Random Topics:
Present Simple & Present Continuous TensesArticles with Proper NounsAuxiliary VerbsSpeech TensesCommon & Proper NounsIndependent ClausesPast PassiveActive vs. Passive VoiceExpressing Obligation and ModalsWill or Going toOther quiz:
Simple Present Tense/be/Present Progessive › ViewIt ___ raining tonight.
A. isn’t
B. aren’t
C. are
Grammar › View
When I suggested… to Ireland, she was really enthusiastic.
A. to go
B. go
C. having gone
D. going
Phrasal Verb › ViewXin Theng ___ four new dresses in the boutique.
A. try on
B. tryon
C. try in
D. tryin
Grammar and Vocabulary › View
If you don’t eat _________ healthy food, your immune system could become weaker.
A. enough
B. always
C. often
D. regularly
