_____ I opened the window, a butterfly came into my ...

[ Grammar ]

_____ I opened the window, a butterfly came into my room.
(A)Although
(B)Before
(C)If
(D)When

Select your answer:

Random Topics:
Question Words Conditional Sentence Type 1 Subject, Verb & Object Complement Present and Past Perfect Tenses Object Pronouns Article Tenses: Present simple, Past Simple, Future Simple Present Simple vs Past Simple Countable Quantifiers

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Many experts have pointed out the importance of ____________ protection in government policy-making.　

A. poisonous

B. environmental

C. obvious

D. proper

Vocabulary › View

Choose the correct comparative adverb.

A. I run more rapidly.

B. i run faster.

C. I run more quickly.

How to use : Read the question carefully, then select one of the answers button.