[ Conditional Sentences ]
If the door is open,
A. you could come in.
B. you could have come in.
C. you can come in.

Random Topics:
Asking & Giving OpinionGerunds in SentencesPresent Perfect Simple vs ContinuousQuantifierHave toComparison & Modal Verbs in Passive VoiceAdjectives vs AdverbsPRESENT SIMPLE vs PRESENT CONTINUOUS + QUANTBe used to vs used toPossessive Pronouns and QuantifiersOther quiz:
Tenses › ViewLast Sunday, our volunteer team ________ a lot of food packages to homeless people in the flood-hit region.
A. were bringing
B. brought
C. have brought
D. had brought
Grammar › View
He used a(n) ………. machine to send a copy of the piece of paper to New York.
A. fax
B. mobile
C. remote
D. answering
Is there a cat?
A. Yes, there is.
B. Yes, there are.
C. No, there isn’t.
D. No, there aren’t.
Vocabulary and Grammar › View
Choose the correct form of ‘unless’: You won’t succeed ________ you try your best.
A. if
B. unless
C. until
D. although
