Unless more people …. (use) public transport, air polution will increase.
B. will use
C. ‘ll use
Past Simple Vs. Present Perfect Relative Pronoun Adjective ClauseComparatives and SuperlativesPersonificationFamily Members and Present SimpleAdjective + to + VerbMust Vs Have toConditional Sentence
Other quiz: Some vs. Any
I need ___ new clothes.
How to use : Read the question carefully, then select one of the answers button.