Affirmative. We ____________ (have) (open) the door to new knowledge. ...

[ Present Perfect Negative and Interrogative ]

Affirmative. We ____________ (have) (open) the door to new knowledge.

A. had open

B. have opened

Select your answer:

Random Topics:
Past Perfect vs Past Simple Word Formation Transitions Employment Vocabulary Adverb and Noun Clauses Present Perfect or Past Simple Tense Adverbs Conditional Type 1 Past Simple (to be)

Other quiz:

Tenses › View

This is the first time I _________ (ever/try) snake.

A. ever tried

B. ever have try

C. have ever tried

D. have ever been trying

Grammar › View

________ the instruction, he knew how to use the fire extinguish

A. Read

B. Reading

C. Having read

D. Having readed