[ Grammar ]
Phong, Vy and Duy (ride)…. their bicycles to school now
A. aren’t riding
B. don’t riding
C. haven’t riding
D. hasn’t riding

Random Topics:
Comparative and SuperlativesVerb FormsLet & Be allowed toSuffixes and TensesCan vs CouldSpeech TensesPast Tense vs Present Perfect TenseReported Speech and Reported QuestionsModals TensesSubordinating Conjunctions and ClausesOther quiz:
Grammar › View‘How to make a sponge cake.’
What type of text could it be?
_______
A. fiction
B. fairy tale
C. invitation
D. instruction
Homonyms › View
Slowly ___ the milk over the cereal.
a. pore
b. pour
What is the infinitive phrase in the following sentence?
In the mall, we want to walk quickly to the food court.
_
A. to walk
B. to the food court
C. In the mall
D. to walk quickly to the food court
Vocabulary and Grammar › View
A great way to improve ______ skills is to keep trying new things.
A. reason
B. reasoning
C. reasons
D. reasoned